Dr Andrew Scott
G7VAV
Senior Lecturer
School of Computing
and Communications
D35 InfoLab21
Lancaster University
Lancaster, LA1 4WA
United Kingdom
School of Computing
and Communications
D35 InfoLab21
Lancaster University
Lancaster, LA1 4WA
United Kingdom
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pthread.h
0001: /* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 0002: Free Software Foundation, Inc. 0003: This file is part of the GNU C Library. 0004: 0005: The GNU C Library is free software; you can redistribute it and/or 0006: modify it under the terms of the GNU Lesser General Public 0007: License as published by the Free Software Foundation; either 0008: version 2.1 of the License, or (at your option) any later version. 0009: 0010: The GNU C Library is distributed in the hope that it will be useful, 0011: but WITHOUT ANY WARRANTY; without even the implied warranty of 0012: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 0013: Lesser General Public License for more details. 0014: 0015: You should have received a copy of the GNU Lesser General Public 0016: License along with the GNU C Library; if not, write to the Free 0017: Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 0018: 02111-1307 USA. */ 0019: 0020: #ifndef _PTHREAD_H 0021: #define _PTHREAD_H 1 0022: 0023: #include <features.h> 0024: #include <endian.h> 0025: #include <sched.h> 0026: #include <time.h> 0027: 0028: #include <bits/pthreadtypes.h> 0029: #include <bits/setjmp.h> 0030: #include <bits/wordsize.h> 0031: 0032: 0033: /* Detach state. */ 0034: enum 0035: { 0036: PTHREAD_CREATE_JOINABLE, 0037: #define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_JOINABLE 0038: PTHREAD_CREATE_DETACHED 0039: #define PTHREAD_CREATE_DETACHED PTHREAD_CREATE_DETACHED 0040: }; 0041: 0042: 0043: /* Mutex types. */ 0044: enum 0045: { 0046: PTHREAD_MUTEX_TIMED_NP, 0047: PTHREAD_MUTEX_RECURSIVE_NP, 0048: PTHREAD_MUTEX_ERRORCHECK_NP, 0049: PTHREAD_MUTEX_ADAPTIVE_NP 0050: #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 0051: , 0052: PTHREAD_MUTEX_NORMAL = PTHREAD_MUTEX_TIMED_NP, 0053: PTHREAD_MUTEX_RECURSIVE = PTHREAD_MUTEX_RECURSIVE_NP, 0054: PTHREAD_MUTEX_ERRORCHECK = PTHREAD_MUTEX_ERRORCHECK_NP, 0055: PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL 0056: #endif 0057: #ifdef __USE_GNU 0058: /* For compatibility. */ 0059: , PTHREAD_MUTEX_FAST_NP = PTHREAD_MUTEX_TIMED_NP 0060: #endif 0061: }; 0062: 0063: 0064: #ifdef __USE_XOPEN2K 0065: /* Robust mutex or not flags. */ 0066: enum 0067: { 0068: PTHREAD_MUTEX_STALLED, 0069: PTHREAD_MUTEX_STALLED_NP = PTHREAD_MUTEX_STALLED, 0070: PTHREAD_MUTEX_ROBUST, 0071: PTHREAD_MUTEX_ROBUST_NP = PTHREAD_MUTEX_ROBUST 0072: }; 0073: #endif 0074: 0075: 0076: #ifdef __USE_UNIX98 0077: /* Mutex protocols. */ 0078: enum 0079: { 0080: PTHREAD_PRIO_NONE, 0081: PTHREAD_PRIO_INHERIT, 0082: PTHREAD_PRIO_PROTECT 0083: }; 0084: #endif 0085: 0086: 0087: /* Mutex initializers. */ 0088: #if __WORDSIZE == 64 0089: # define PTHREAD_MUTEX_INITIALIZER \ 0090: { { 0, 0, 0, 0, 0, 0, { 0, 0 } } } 0091: # ifdef __USE_GNU 0092: # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ 0093: { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0, 0 } } } 0094: # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ 0095: { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0, 0 } } } 0096: # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ 0097: { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0, 0 } } } 0098: # endif 0099: #else 0100: # define PTHREAD_MUTEX_INITIALIZER \ 0101: { { 0, 0, 0, 0, 0, { 0 } } } 0102: # ifdef __USE_GNU 0103: # define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \ 0104: { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0 } } } 0105: # define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \ 0106: { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0 } } } 0107: # define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \ 0108: { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0 } } } 0109: # endif 0110: #endif 0111: 0112: 0113: /* Read-write lock types. */ 0114: #if defined __USE_UNIX98 || defined __USE_XOPEN2K 0115: enum 0116: { 0117: PTHREAD_RWLOCK_PREFER_READER_NP, 0118: PTHREAD_RWLOCK_PREFER_WRITER_NP, 0119: PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 0120: PTHREAD_RWLOCK_DEFAULT_NP = PTHREAD_RWLOCK_PREFER_READER_NP 0121: }; 0122: 0123: /* Read-write lock initializers. */ 0124: # define PTHREAD_RWLOCK_INITIALIZER \ 0125: { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } } 0126: # ifdef __USE_GNU 0127: # if __WORDSIZE == 64 0128: # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ 0129: { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 0130: PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP } } 0131: # else 0132: # if __BYTE_ORDER == __LITTLE_ENDIAN 0133: # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ 0134: { { 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, \ 0135: 0, 0, 0, 0 } } 0136: # else 0137: # define PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP \ 0138: { { 0, 0, 0, 0, 0, 0, 0, 0, 0, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,\ 0139: 0 } } 0140: # endif 0141: # endif 0142: # endif 0143: #endif /* Unix98 or XOpen2K */ 0144: 0145: 0146: /* Scheduler inheritance. */ 0147: enum 0148: { 0149: PTHREAD_INHERIT_SCHED, 0150: #define PTHREAD_INHERIT_SCHED PTHREAD_INHERIT_SCHED 0151: PTHREAD_EXPLICIT_SCHED 0152: #define PTHREAD_EXPLICIT_SCHED PTHREAD_EXPLICIT_SCHED 0153: }; 0154: 0155: 0156: /* Scope handling. */ 0157: enum 0158: { 0159: PTHREAD_SCOPE_SYSTEM, 0160: #define PTHREAD_SCOPE_SYSTEM PTHREAD_SCOPE_SYSTEM 0161: PTHREAD_SCOPE_PROCESS 0162: #define PTHREAD_SCOPE_PROCESS PTHREAD_SCOPE_PROCESS 0163: }; 0164: 0165: 0166: /* Process shared or private flag. */ 0167: enum 0168: { 0169: PTHREAD_PROCESS_PRIVATE, 0170: #define PTHREAD_PROCESS_PRIVATE PTHREAD_PROCESS_PRIVATE 0171: PTHREAD_PROCESS_SHARED 0172: #define PTHREAD_PROCESS_SHARED PTHREAD_PROCESS_SHARED 0173: }; 0174: 0175: 0176: 0177: /* Conditional variable handling. */ 0178: #define PTHREAD_COND_INITIALIZER { { 0, 0, 0, 0, 0, (void *) 0, 0, 0 } } 0179: 0180: 0181: /* Cleanup buffers */ 0182: struct _pthread_cleanup_buffer 0183: { 0184: void (*__routine) (void *); /* Function to call. */ 0185: void *__arg; /* Its argument. */ 0186: int __canceltype; /* Saved cancellation type. */ 0187: struct _pthread_cleanup_buffer *__prev; /* Chaining of cleanup functions. */ 0188: }; 0189: 0190: /* Cancellation */ 0191: enum 0192: { 0193: PTHREAD_CANCEL_ENABLE, 0194: #define PTHREAD_CANCEL_ENABLE PTHREAD_CANCEL_ENABLE 0195: PTHREAD_CANCEL_DISABLE 0196: #define PTHREAD_CANCEL_DISABLE PTHREAD_CANCEL_DISABLE 0197: }; 0198: enum 0199: { 0200: PTHREAD_CANCEL_DEFERRED, 0201: #define PTHREAD_CANCEL_DEFERRED PTHREAD_CANCEL_DEFERRED 0202: PTHREAD_CANCEL_ASYNCHRONOUS 0203: #define PTHREAD_CANCEL_ASYNCHRONOUS PTHREAD_CANCEL_ASYNCHRONOUS 0204: }; 0205: #define PTHREAD_CANCELED ((void *) -1) 0206: 0207: 0208: /* Single execution handling. */ 0209: #define PTHREAD_ONCE_INIT 0 0210: 0211: 0212: #ifdef __USE_XOPEN2K 0213: /* Value returned by 'pthread_barrier_wait' for one of the threads after 0214: the required number of threads have called this function. 0215: -1 is distinct from 0 and all errno constants */ 0216: # define PTHREAD_BARRIER_SERIAL_THREAD -1 0217: #endif 0218: 0219: 0220: __BEGIN_DECLS 0221: 0222: /* Create a new thread, starting with execution of START-ROUTINE 0223: getting passed ARG. Creation attributed come from ATTR. The new 0224: handle is stored in *NEWTHREAD. */ 0225: extern int pthread_create (pthread_t *__restrict __newthread, 0226: __const pthread_attr_t *__restrict __attr, 0227: void *(*__start_routine) (void *), 0228: void *__restrict __arg) __THROWNL __nonnull ((1, 3)); 0229: 0230: /* Terminate calling thread. 0231: 0232: The registered cleanup handlers are called via exception handling 0233: so we cannot mark this function with __THROW.*/ 0234: extern void pthread_exit (void *__retval) __attribute__ ((__noreturn__)); 0235: 0236: /* Make calling thread wait for termination of the thread TH. The 0237: exit status of the thread is stored in *THREAD_RETURN, if THREAD_RETURN 0238: is not NULL. 0239: 0240: This function is a cancellation point and therefore not marked with 0241: __THROW. */ 0242: extern int pthread_join (pthread_t __th, void **__thread_return); 0243: 0244: #ifdef __USE_GNU 0245: /* Check whether thread TH has terminated. If yes return the status of 0246: the thread in *THREAD_RETURN, if THREAD_RETURN is not NULL. */ 0247: extern int pthread_tryjoin_np (pthread_t __th, void **__thread_return) __THROW; 0248: 0249: /* Make calling thread wait for termination of the thread TH, but only 0250: until TIMEOUT. The exit status of the thread is stored in 0251: *THREAD_RETURN, if THREAD_RETURN is not NULL. 0252: 0253: This function is a cancellation point and therefore not marked with 0254: __THROW. */ 0255: extern int pthread_timedjoin_np (pthread_t __th, void **__thread_return, 0256: __const struct timespec *__abstime); 0257: #endif 0258: 0259: /* Indicate that the thread TH is never to be joined with PTHREAD_JOIN. 0260: The resources of TH will therefore be freed immediately when it 0261: terminates, instead of waiting for another thread to perform PTHREAD_JOIN 0262: on it. */ 0263: extern int pthread_detach (pthread_t __th) __THROW; 0264: 0265: 0266: /* Obtain the identifier of the current thread. */ 0267: extern pthread_t pthread_self (void) __THROW __attribute__ ((__const__)); 0268: 0269: /* Compare two thread identifiers. */ 0270: extern int pthread_equal (pthread_t __thread1, pthread_t __thread2) __THROW; 0271: 0272: 0273: /* Thread attribute handling. */ 0274: 0275: /* Initialize thread attribute *ATTR with default attributes 0276: (detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER, 0277: no user-provided stack). */ 0278: extern int pthread_attr_init (pthread_attr_t *__attr) __THROW __nonnull ((1)); 0279: 0280: /* Destroy thread attribute *ATTR. */ 0281: extern int pthread_attr_destroy (pthread_attr_t *__attr) 0282: __THROW __nonnull ((1)); 0283: 0284: /* Get detach state attribute. */ 0285: extern int pthread_attr_getdetachstate (__const pthread_attr_t *__attr, 0286: int *__detachstate) 0287: __THROW __nonnull ((1, 2)); 0288: 0289: /* Set detach state attribute. */ 0290: extern int pthread_attr_setdetachstate (pthread_attr_t *__attr, 0291: int __detachstate) 0292: __THROW __nonnull ((1)); 0293: 0294: 0295: /* Get the size of the guard area created for stack overflow protection. */ 0296: extern int pthread_attr_getguardsize (__const pthread_attr_t *__attr, 0297: size_t *__guardsize) 0298: __THROW __nonnull ((1, 2)); 0299: 0300: /* Set the size of the guard area created for stack overflow protection. */ 0301: extern int pthread_attr_setguardsize (pthread_attr_t *__attr, 0302: size_t __guardsize) 0303: __THROW __nonnull ((1)); 0304: 0305: 0306: /* Return in *PARAM the scheduling parameters of *ATTR. */ 0307: extern int pthread_attr_getschedparam (__const pthread_attr_t *__restrict 0308: __attr, 0309: struct sched_param *__restrict __param) 0310: __THROW __nonnull ((1, 2)); 0311: 0312: /* Set scheduling parameters (priority, etc) in *ATTR according to PARAM. */ 0313: extern int pthread_attr_setschedparam (pthread_attr_t *__restrict __attr, 0314: __const struct sched_param *__restrict 0315: __param) __THROW __nonnull ((1, 2)); 0316: 0317: /* Return in *POLICY the scheduling policy of *ATTR. */ 0318: extern int pthread_attr_getschedpolicy (__const pthread_attr_t *__restrict 0319: __attr, int *__restrict __policy) 0320: __THROW __nonnull ((1, 2)); 0321: 0322: /* Set scheduling policy in *ATTR according to POLICY. */ 0323: extern int pthread_attr_setschedpolicy (pthread_attr_t *__attr, int __policy) 0324: __THROW __nonnull ((1)); 0325: 0326: /* Return in *INHERIT the scheduling inheritance mode of *ATTR. */ 0327: extern int pthread_attr_getinheritsched (__const pthread_attr_t *__restrict 0328: __attr, int *__restrict __inherit) 0329: __THROW __nonnull ((1, 2)); 0330: 0331: /* Set scheduling inheritance mode in *ATTR according to INHERIT. */ 0332: extern int pthread_attr_setinheritsched (pthread_attr_t *__attr, 0333: int __inherit) 0334: __THROW __nonnull ((1)); 0335: 0336: 0337: /* Return in *SCOPE the scheduling contention scope of *ATTR. */ 0338: extern int pthread_attr_getscope (__const pthread_attr_t *__restrict __attr, 0339: int *__restrict __scope) 0340: __THROW __nonnull ((1, 2)); 0341: 0342: /* Set scheduling contention scope in *ATTR according to SCOPE. */ 0343: extern int pthread_attr_setscope (pthread_attr_t *__attr, int __scope) 0344: __THROW __nonnull ((1)); 0345: 0346: /* Return the previously set address for the stack. */ 0347: extern int pthread_attr_getstackaddr (__const pthread_attr_t *__restrict 0348: __attr, void **__restrict __stackaddr) 0349: __THROW __nonnull ((1, 2)) __attribute_deprecated__; 0350: 0351: /* Set the starting address of the stack of the thread to be created. 0352: Depending on whether the stack grows up or down the value must either 0353: be higher or lower than all the address in the memory block. The 0354: minimal size of the block must be PTHREAD_STACK_MIN. */ 0355: extern int pthread_attr_setstackaddr (pthread_attr_t *__attr, 0356: void *__stackaddr) 0357: __THROW __nonnull ((1)) __attribute_deprecated__; 0358: 0359: /* Return the currently used minimal stack size. */ 0360: extern int pthread_attr_getstacksize (__const pthread_attr_t *__restrict 0361: __attr, size_t *__restrict __stacksize) 0362: __THROW __nonnull ((1, 2)); 0363: 0364: /* Add information about the minimum stack size needed for the thread 0365: to be started. This size must never be less than PTHREAD_STACK_MIN 0366: and must also not exceed the system limits. */ 0367: extern int pthread_attr_setstacksize (pthread_attr_t *__attr, 0368: size_t __stacksize) 0369: __THROW __nonnull ((1)); 0370: 0371: #ifdef __USE_XOPEN2K 0372: /* Return the previously set address for the stack. */ 0373: extern int pthread_attr_getstack (__const pthread_attr_t *__restrict __attr, 0374: void **__restrict __stackaddr, 0375: size_t *__restrict __stacksize) 0376: __THROW __nonnull ((1, 2, 3)); 0377: 0378: /* The following two interfaces are intended to replace the last two. They 0379: require setting the address as well as the size since only setting the 0380: address will make the implementation on some architectures impossible. */ 0381: extern int pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr, 0382: size_t __stacksize) __THROW __nonnull ((1)); 0383: #endif 0384: 0385: #ifdef __USE_GNU 0386: /* Thread created with attribute ATTR will be limited to run only on 0387: the processors represented in CPUSET. */ 0388: extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr, 0389: size_t __cpusetsize, 0390: __const cpu_set_t *__cpuset) 0391: __THROW __nonnull ((1, 3)); 0392: 0393: /* Get bit set in CPUSET representing the processors threads created with 0394: ATTR can run on. */ 0395: extern int pthread_attr_getaffinity_np (__const pthread_attr_t *__attr, 0396: size_t __cpusetsize, 0397: cpu_set_t *__cpuset) 0398: __THROW __nonnull ((1, 3)); 0399: 0400: 0401: /* Initialize thread attribute *ATTR with attributes corresponding to the 0402: already running thread TH. It shall be called on uninitialized ATTR 0403: and destroyed with pthread_attr_destroy when no longer needed. */ 0404: extern int pthread_getattr_np (pthread_t __th, pthread_attr_t *__attr) 0405: __THROW __nonnull ((2)); 0406: #endif 0407: 0408: 0409: /* Functions for scheduling control. */ 0410: 0411: /* Set the scheduling parameters for TARGET_THREAD according to POLICY 0412: and *PARAM. */ 0413: extern int pthread_setschedparam (pthread_t __target_thread, int __policy, 0414: __const struct sched_param *__param) 0415: __THROW __nonnull ((3)); 0416: 0417: /* Return in *POLICY and *PARAM the scheduling parameters for TARGET_THREAD. */ 0418: extern int pthread_getschedparam (pthread_t __target_thread, 0419: int *__restrict __policy, 0420: struct sched_param *__restrict __param) 0421: __THROW __nonnull ((2, 3)); 0422: 0423: /* Set the scheduling priority for TARGET_THREAD. */ 0424: extern int pthread_setschedprio (pthread_t __target_thread, int __prio) 0425: __THROW; 0426: 0427: 0428: #ifdef __USE_GNU 0429: /* Get thread name visible in the kernel and its interfaces. */ 0430: extern int pthread_getname_np (pthread_t __target_thread, char *__buf, 0431: size_t __buflen) 0432: __THROW __nonnull ((2)); 0433: 0434: /* Set thread name visible in the kernel and its interfaces. */ 0435: extern int pthread_setname_np (pthread_t __target_thread, __const char *__name) 0436: __THROW __nonnull ((2)); 0437: #endif 0438: 0439: 0440: #ifdef __USE_UNIX98 0441: /* Determine level of concurrency. */ 0442: extern int pthread_getconcurrency (void) __THROW; 0443: 0444: /* Set new concurrency level to LEVEL. */ 0445: extern int pthread_setconcurrency (int __level) __THROW; 0446: #endif 0447: 0448: #ifdef __USE_GNU 0449: /* Yield the processor to another thread or process. 0450: This function is similar to the POSIX `sched_yield' function but 0451: might be differently implemented in the case of a m-on-n thread 0452: implementation. */ 0453: extern int pthread_yield (void) __THROW; 0454: 0455: 0456: /* Limit specified thread TH to run only on the processors represented 0457: in CPUSET. */ 0458: extern int pthread_setaffinity_np (pthread_t __th, size_t __cpusetsize, 0459: __const cpu_set_t *__cpuset) 0460: __THROW __nonnull ((3)); 0461: 0462: /* Get bit set in CPUSET representing the processors TH can run on. */ 0463: extern int pthread_getaffinity_np (pthread_t __th, size_t __cpusetsize, 0464: cpu_set_t *__cpuset) 0465: __THROW __nonnull ((3)); 0466: #endif 0467: 0468: 0469: /* Functions for handling initialization. */ 0470: 0471: /* Guarantee that the initialization function INIT_ROUTINE will be called 0472: only once, even if pthread_once is executed several times with the 0473: same ONCE_CONTROL argument. ONCE_CONTROL must point to a static or 0474: extern variable initialized to PTHREAD_ONCE_INIT. 0475: 0476: The initialization functions might throw exception which is why 0477: this function is not marked with __THROW. */ 0478: extern int pthread_once (pthread_once_t *__once_control, 0479: void (*__init_routine) (void)) __nonnull ((1, 2)); 0480: 0481: 0482: /* Functions for handling cancellation. 0483: 0484: Note that these functions are explicitly not marked to not throw an 0485: exception in C++ code. If cancellation is implemented by unwinding 0486: this is necessary to have the compiler generate the unwind information. */ 0487: 0488: /* Set cancelability state of current thread to STATE, returning old 0489: state in *OLDSTATE if OLDSTATE is not NULL. */ 0490: extern int pthread_setcancelstate (int __state, int *__oldstate); 0491: 0492: /* Set cancellation state of current thread to TYPE, returning the old 0493: type in *OLDTYPE if OLDTYPE is not NULL. */ 0494: extern int pthread_setcanceltype (int __type, int *__oldtype); 0495: 0496: /* Cancel THREAD immediately or at the next possibility. */ 0497: extern int pthread_cancel (pthread_t __th); 0498: 0499: /* Test for pending cancellation for the current thread and terminate 0500: the thread as per pthread_exit(PTHREAD_CANCELED) if it has been 0501: cancelled. */ 0502: extern void pthread_testcancel (void); 0503: 0504: 0505: /* Cancellation handling with integration into exception handling. */ 0506: 0507: typedef struct 0508: { 0509: struct 0510: { 0511: __jmp_buf __cancel_jmp_buf; 0512: int __mask_was_saved; 0513: } __cancel_jmp_buf[1]; 0514: void *__pad[4]; 0515: } __pthread_unwind_buf_t __attribute__ ((__aligned__)); 0516: 0517: /* No special attributes by default. */ 0518: #ifndef __cleanup_fct_attribute 0519: # define __cleanup_fct_attribute 0520: #endif 0521: 0522: 0523: /* Structure to hold the cleanup handler information. */ 0524: struct __pthread_cleanup_frame 0525: { 0526: void (*__cancel_routine) (void *); 0527: void *__cancel_arg; 0528: int __do_it; 0529: int __cancel_type; 0530: }; 0531: 0532: #if defined __GNUC__ && defined __EXCEPTIONS 0533: # ifdef __cplusplus 0534: /* Class to handle cancellation handler invocation. */ 0535: class __pthread_cleanup_class 0536: { 0537: void (*__cancel_routine) (void *); 0538: void *__cancel_arg; 0539: int __do_it; 0540: int __cancel_type; 0541: 0542: public: 0543: __pthread_cleanup_class (void (*__fct) (void *), void *__arg) 0544: : __cancel_routine (__fct), __cancel_arg (__arg), __do_it (1) { } 0545: ~__pthread_cleanup_class () { if (__do_it) __cancel_routine (__cancel_arg); } 0546: void __setdoit (int __newval) { __do_it = __newval; } 0547: void __defer () { pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, 0548: &__cancel_type); } 0549: void __restore () const { pthread_setcanceltype (__cancel_type, 0); } 0550: }; 0551: 0552: /* Install a cleanup handler: ROUTINE will be called with arguments ARG 0553: when the thread is canceled or calls pthread_exit. ROUTINE will also 0554: be called with arguments ARG when the matching pthread_cleanup_pop 0555: is executed with non-zero EXECUTE argument. 0556: 0557: pthread_cleanup_push and pthread_cleanup_pop are macros and must always 0558: be used in matching pairs at the same nesting level of braces. */ 0559: # define pthread_cleanup_push(routine, arg) \ 0560: do { \ 0561: __pthread_cleanup_class __clframe (routine, arg) 0562: 0563: /* Remove a cleanup handler installed by the matching pthread_cleanup_push. 0564: If EXECUTE is non-zero, the handler function is called. */ 0565: # define pthread_cleanup_pop(execute) \ 0566: __clframe.__setdoit (execute); \ 0567: } while (0) 0568: 0569: # ifdef __USE_GNU 0570: /* Install a cleanup handler as pthread_cleanup_push does, but also 0571: saves the current cancellation type and sets it to deferred 0572: cancellation. */ 0573: # define pthread_cleanup_push_defer_np(routine, arg) \ 0574: do { \ 0575: __pthread_cleanup_class __clframe (routine, arg); \ 0576: __clframe.__defer () 0577: 0578: /* Remove a cleanup handler as pthread_cleanup_pop does, but also 0579: restores the cancellation type that was in effect when the matching 0580: pthread_cleanup_push_defer was called. */ 0581: # define pthread_cleanup_pop_restore_np(execute) \ 0582: __clframe.__restore (); \ 0583: __clframe.__setdoit (execute); \ 0584: } while (0) 0585: # endif 0586: # else 0587: /* Function called to call the cleanup handler. As an extern inline 0588: function the compiler is free to decide inlining the change when 0589: needed or fall back on the copy which must exist somewhere 0590: else. */ 0591: __extern_inline void 0592: __pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame) 0593: { 0594: if (__frame->__do_it) 0595: __frame->__cancel_routine (__frame->__cancel_arg); 0596: } 0597: 0598: /* Install a cleanup handler: ROUTINE will be called with arguments ARG 0599: when the thread is canceled or calls pthread_exit. ROUTINE will also 0600: be called with arguments ARG when the matching pthread_cleanup_pop 0601: is executed with non-zero EXECUTE argument. 0602: 0603: pthread_cleanup_push and pthread_cleanup_pop are macros and must always 0604: be used in matching pairs at the same nesting level of braces. */ 0605: # define pthread_cleanup_push(routine, arg) \ 0606: do { \ 0607: struct __pthread_cleanup_frame __clframe \ 0608: __attribute__ ((__cleanup__ (__pthread_cleanup_routine))) \ 0609: = { .__cancel_routine = (routine), .__cancel_arg = (arg), \ 0610: .__do_it = 1 }; 0611: 0612: /* Remove a cleanup handler installed by the matching pthread_cleanup_push. 0613: If EXECUTE is non-zero, the handler function is called. */ 0614: # define pthread_cleanup_pop(execute) \ 0615: __clframe.__do_it = (execute); \ 0616: } while (0) 0617: 0618: # ifdef __USE_GNU 0619: /* Install a cleanup handler as pthread_cleanup_push does, but also 0620: saves the current cancellation type and sets it to deferred 0621: cancellation. */ 0622: # define pthread_cleanup_push_defer_np(routine, arg) \ 0623: do { \ 0624: struct __pthread_cleanup_frame __clframe \ 0625: __attribute__ ((__cleanup__ (__pthread_cleanup_routine))) \ 0626: = { .__cancel_routine = (routine), .__cancel_arg = (arg), \ 0627: .__do_it = 1 }; \ 0628: (void) pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, \ 0629: &__clframe.__cancel_type) 0630: 0631: /* Remove a cleanup handler as pthread_cleanup_pop does, but also 0632: restores the cancellation type that was in effect when the matching 0633: pthread_cleanup_push_defer was called. */ 0634: # define pthread_cleanup_pop_restore_np(execute) \ 0635: (void) pthread_setcanceltype (__clframe.__cancel_type, NULL); \ 0636: __clframe.__do_it = (execute); \ 0637: } while (0) 0638: # endif 0639: # endif 0640: #else 0641: /* Install a cleanup handler: ROUTINE will be called with arguments ARG 0642: when the thread is canceled or calls pthread_exit. ROUTINE will also 0643: be called with arguments ARG when the matching pthread_cleanup_pop 0644: is executed with non-zero EXECUTE argument. 0645: 0646: pthread_cleanup_push and pthread_cleanup_pop are macros and must always 0647: be used in matching pairs at the same nesting level of braces. */ 0648: # define pthread_cleanup_push(routine, arg) \ 0649: do { \ 0650: __pthread_unwind_buf_t __cancel_buf; \ 0651: void (*__cancel_routine) (void *) = (routine); \ 0652: void *__cancel_arg = (arg); \ 0653: int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \ 0654: __cancel_buf.__cancel_jmp_buf, 0); \ 0655: if (__builtin_expect (__not_first_call, 0)) \ 0656: { \ 0657: __cancel_routine (__cancel_arg); \ 0658: __pthread_unwind_next (&__cancel_buf); \ 0659: /* NOTREACHED */ \ 0660: } \ 0661: \ 0662: __pthread_register_cancel (&__cancel_buf); \ 0663: do { 0664: extern void __pthread_register_cancel (__pthread_unwind_buf_t *__buf) 0665: __cleanup_fct_attribute; 0666: 0667: /* Remove a cleanup handler installed by the matching pthread_cleanup_push. 0668: If EXECUTE is non-zero, the handler function is called. */ 0669: # define pthread_cleanup_pop(execute) \ 0670: do { } while (0);/* Empty to allow label before pthread_cleanup_pop. */\ 0671: } while (0); \ 0672: __pthread_unregister_cancel (&__cancel_buf); \ 0673: if (execute) \ 0674: __cancel_routine (__cancel_arg); \ 0675: } while (0) 0676: extern void __pthread_unregister_cancel (__pthread_unwind_buf_t *__buf) 0677: __cleanup_fct_attribute; 0678: 0679: # ifdef __USE_GNU 0680: /* Install a cleanup handler as pthread_cleanup_push does, but also 0681: saves the current cancellation type and sets it to deferred 0682: cancellation. */ 0683: # define pthread_cleanup_push_defer_np(routine, arg) \ 0684: do { \ 0685: __pthread_unwind_buf_t __cancel_buf; \ 0686: void (*__cancel_routine) (void *) = (routine); \ 0687: void *__cancel_arg = (arg); \ 0688: int __not_first_call = __sigsetjmp ((struct __jmp_buf_tag *) (void *) \ 0689: __cancel_buf.__cancel_jmp_buf, 0); \ 0690: if (__builtin_expect (__not_first_call, 0)) \ 0691: { \ 0692: __cancel_routine (__cancel_arg); \ 0693: __pthread_unwind_next (&__cancel_buf); \ 0694: /* NOTREACHED */ \ 0695: } \ 0696: \ 0697: __pthread_register_cancel_defer (&__cancel_buf); \ 0698: do { 0699: extern void __pthread_register_cancel_defer (__pthread_unwind_buf_t *__buf) 0700: __cleanup_fct_attribute; 0701: 0702: /* Remove a cleanup handler as pthread_cleanup_pop does, but also 0703: restores the cancellation type that was in effect when the matching 0704: pthread_cleanup_push_defer was called. */ 0705: # define pthread_cleanup_pop_restore_np(execute) \ 0706: do { } while (0);/* Empty to allow label before pthread_cleanup_pop. */\ 0707: } while (0); \ 0708: __pthread_unregister_cancel_restore (&__cancel_buf); \ 0709: if (execute) \ 0710: __cancel_routine (__cancel_arg); \ 0711: } while (0) 0712: extern void __pthread_unregister_cancel_restore (__pthread_unwind_buf_t *__buf) 0713: __cleanup_fct_attribute; 0714: # endif 0715: 0716: /* Internal interface to initiate cleanup. */ 0717: extern void __pthread_unwind_next (__pthread_unwind_buf_t *__buf) 0718: __cleanup_fct_attribute __attribute__ ((__noreturn__)) 0719: # ifndef SHARED 0720: __attribute__ ((__weak__)) 0721: # endif 0722: ; 0723: #endif 0724: 0725: /* Function used in the macros. */ 0726: struct __jmp_buf_tag; 0727: extern int __sigsetjmp (struct __jmp_buf_tag *__env, int __savemask) __THROW; 0728: 0729: 0730: /* Mutex handling. */ 0731: 0732: /* Initialize a mutex. */ 0733: extern int pthread_mutex_init (pthread_mutex_t *__mutex, 0734: __const pthread_mutexattr_t *__mutexattr) 0735: __THROW __nonnull ((1)); 0736: 0737: /* Destroy a mutex. */ 0738: extern int pthread_mutex_destroy (pthread_mutex_t *__mutex) 0739: __THROW __nonnull ((1)); 0740: 0741: /* Try locking a mutex. */ 0742: extern int pthread_mutex_trylock (pthread_mutex_t *__mutex) 0743: __THROWNL __nonnull ((1)); 0744: 0745: /* Lock a mutex. */ 0746: extern int pthread_mutex_lock (pthread_mutex_t *__mutex) 0747: __THROWNL __nonnull ((1)); 0748: 0749: #ifdef __USE_XOPEN2K 0750: /* Wait until lock becomes available, or specified time passes. */ 0751: extern int pthread_mutex_timedlock (pthread_mutex_t *__restrict __mutex, 0752: __const struct timespec *__restrict 0753: __abstime) __THROWNL __nonnull ((1, 2)); 0754: #endif 0755: 0756: /* Unlock a mutex. */ 0757: extern int pthread_mutex_unlock (pthread_mutex_t *__mutex) 0758: __THROWNL __nonnull ((1)); 0759: 0760: 0761: /* Get the priority ceiling of MUTEX. */ 0762: extern int pthread_mutex_getprioceiling (__const pthread_mutex_t * 0763: __restrict __mutex, 0764: int *__restrict __prioceiling) 0765: __THROW __nonnull ((1, 2)); 0766: 0767: /* Set the priority ceiling of MUTEX to PRIOCEILING, return old 0768: priority ceiling value in *OLD_CEILING. */ 0769: extern int pthread_mutex_setprioceiling (pthread_mutex_t *__restrict __mutex, 0770: int __prioceiling, 0771: int *__restrict __old_ceiling) 0772: __THROW __nonnull ((1, 3)); 0773: 0774: 0775: #ifdef __USE_XOPEN2K8 0776: /* Declare the state protected by MUTEX as consistent. */ 0777: extern int pthread_mutex_consistent (pthread_mutex_t *__mutex) 0778: __THROW __nonnull ((1)); 0779: # ifdef __USE_GNU 0780: extern int pthread_mutex_consistent_np (pthread_mutex_t *__mutex) 0781: __THROW __nonnull ((1)); 0782: # endif 0783: #endif 0784: 0785: 0786: /* Functions for handling mutex attributes. */ 0787: 0788: /* Initialize mutex attribute object ATTR with default attributes 0789: (kind is PTHREAD_MUTEX_TIMED_NP). */ 0790: extern int pthread_mutexattr_init (pthread_mutexattr_t *__attr) 0791: __THROW __nonnull ((1)); 0792: 0793: /* Destroy mutex attribute object ATTR. */ 0794: extern int pthread_mutexattr_destroy (pthread_mutexattr_t *__attr) 0795: __THROW __nonnull ((1)); 0796: 0797: /* Get the process-shared flag of the mutex attribute ATTR. */ 0798: extern int pthread_mutexattr_getpshared (__const pthread_mutexattr_t * 0799: __restrict __attr, 0800: int *__restrict __pshared) 0801: __THROW __nonnull ((1, 2)); 0802: 0803: /* Set the process-shared flag of the mutex attribute ATTR. */ 0804: extern int pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr, 0805: int __pshared) 0806: __THROW __nonnull ((1)); 0807: 0808: #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 0809: /* Return in *KIND the mutex kind attribute in *ATTR. */ 0810: extern int pthread_mutexattr_gettype (__const pthread_mutexattr_t *__restrict 0811: __attr, int *__restrict __kind) 0812: __THROW __nonnull ((1, 2)); 0813: 0814: /* Set the mutex kind attribute in *ATTR to KIND (either PTHREAD_MUTEX_NORMAL, 0815: PTHREAD_MUTEX_RECURSIVE, PTHREAD_MUTEX_ERRORCHECK, or 0816: PTHREAD_MUTEX_DEFAULT). */ 0817: extern int pthread_mutexattr_settype (pthread_mutexattr_t *__attr, int __kind) 0818: __THROW __nonnull ((1)); 0819: #endif 0820: 0821: /* Return in *PROTOCOL the mutex protocol attribute in *ATTR. */ 0822: extern int pthread_mutexattr_getprotocol (__const pthread_mutexattr_t * 0823: __restrict __attr, 0824: int *__restrict __protocol) 0825: __THROW __nonnull ((1, 2)); 0826: 0827: /* Set the mutex protocol attribute in *ATTR to PROTOCOL (either 0828: PTHREAD_PRIO_NONE, PTHREAD_PRIO_INHERIT, or PTHREAD_PRIO_PROTECT). */ 0829: extern int pthread_mutexattr_setprotocol (pthread_mutexattr_t *__attr, 0830: int __protocol) 0831: __THROW __nonnull ((1)); 0832: 0833: /* Return in *PRIOCEILING the mutex prioceiling attribute in *ATTR. */ 0834: extern int pthread_mutexattr_getprioceiling (__const pthread_mutexattr_t * 0835: __restrict __attr, 0836: int *__restrict __prioceiling) 0837: __THROW __nonnull ((1, 2)); 0838: 0839: /* Set the mutex prioceiling attribute in *ATTR to PRIOCEILING. */ 0840: extern int pthread_mutexattr_setprioceiling (pthread_mutexattr_t *__attr, 0841: int __prioceiling) 0842: __THROW __nonnull ((1)); 0843: 0844: #ifdef __USE_XOPEN2K 0845: /* Get the robustness flag of the mutex attribute ATTR. */ 0846: extern int pthread_mutexattr_getrobust (__const pthread_mutexattr_t *__attr, 0847: int *__robustness) 0848: __THROW __nonnull ((1, 2)); 0849: # ifdef __USE_GNU 0850: extern int pthread_mutexattr_getrobust_np (__const pthread_mutexattr_t *__attr, 0851: int *__robustness) 0852: __THROW __nonnull ((1, 2)); 0853: # endif 0854: 0855: /* Set the robustness flag of the mutex attribute ATTR. */ 0856: extern int pthread_mutexattr_setrobust (pthread_mutexattr_t *__attr, 0857: int __robustness) 0858: __THROW __nonnull ((1)); 0859: # ifdef __USE_GNU 0860: extern int pthread_mutexattr_setrobust_np (pthread_mutexattr_t *__attr, 0861: int __robustness) 0862: __THROW __nonnull ((1)); 0863: # endif 0864: #endif 0865: 0866: 0867: #if defined __USE_UNIX98 || defined __USE_XOPEN2K 0868: /* Functions for handling read-write locks. */ 0869: 0870: /* Initialize read-write lock RWLOCK using attributes ATTR, or use 0871: the default values if later is NULL. */ 0872: extern int pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock, 0873: __const pthread_rwlockattr_t *__restrict 0874: __attr) __THROW __nonnull ((1)); 0875: 0876: /* Destroy read-write lock RWLOCK. */ 0877: extern int pthread_rwlock_destroy (pthread_rwlock_t *__rwlock) 0878: __THROW __nonnull ((1)); 0879: 0880: /* Acquire read lock for RWLOCK. */ 0881: extern int pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock) 0882: __THROWNL __nonnull ((1)); 0883: 0884: /* Try to acquire read lock for RWLOCK. */ 0885: extern int pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock) 0886: __THROWNL __nonnull ((1)); 0887: 0888: # ifdef __USE_XOPEN2K 0889: /* Try to acquire read lock for RWLOCK or return after specfied time. */ 0890: extern int pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock, 0891: __const struct timespec *__restrict 0892: __abstime) __THROWNL __nonnull ((1, 2)); 0893: # endif 0894: 0895: /* Acquire write lock for RWLOCK. */ 0896: extern int pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock) 0897: __THROWNL __nonnull ((1)); 0898: 0899: /* Try to acquire write lock for RWLOCK. */ 0900: extern int pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock) 0901: __THROWNL __nonnull ((1)); 0902: 0903: # ifdef __USE_XOPEN2K 0904: /* Try to acquire write lock for RWLOCK or return after specfied time. */ 0905: extern int pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock, 0906: __const struct timespec *__restrict 0907: __abstime) __THROWNL __nonnull ((1, 2)); 0908: # endif 0909: 0910: /* Unlock RWLOCK. */ 0911: extern int pthread_rwlock_unlock (pthread_rwlock_t *__rwlock) 0912: __THROWNL __nonnull ((1)); 0913: 0914: 0915: /* Functions for handling read-write lock attributes. */ 0916: 0917: /* Initialize attribute object ATTR with default values. */ 0918: extern int pthread_rwlockattr_init (pthread_rwlockattr_t *__attr) 0919: __THROW __nonnull ((1)); 0920: 0921: /* Destroy attribute object ATTR. */ 0922: extern int pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr) 0923: __THROW __nonnull ((1)); 0924: 0925: /* Return current setting of process-shared attribute of ATTR in PSHARED. */ 0926: extern int pthread_rwlockattr_getpshared (__const pthread_rwlockattr_t * 0927: __restrict __attr, 0928: int *__restrict __pshared) 0929: __THROW __nonnull ((1, 2)); 0930: 0931: /* Set process-shared attribute of ATTR to PSHARED. */ 0932: extern int pthread_rwlockattr_setpshared (pthread_rwlockattr_t *__attr, 0933: int __pshared) 0934: __THROW __nonnull ((1)); 0935: 0936: /* Return current setting of reader/writer preference. */ 0937: extern int pthread_rwlockattr_getkind_np (__const pthread_rwlockattr_t * 0938: __restrict __attr, 0939: int *__restrict __pref) 0940: __THROW __nonnull ((1, 2)); 0941: 0942: /* Set reader/write preference. */ 0943: extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr, 0944: int __pref) __THROW __nonnull ((1)); 0945: #endif 0946: 0947: 0948: /* Functions for handling conditional variables. */ 0949: 0950: /* Initialize condition variable COND using attributes ATTR, or use 0951: the default values if later is NULL. */ 0952: extern int pthread_cond_init (pthread_cond_t *__restrict __cond, 0953: __const pthread_condattr_t *__restrict 0954: __cond_attr) __THROW __nonnull ((1)); 0955: 0956: /* Destroy condition variable COND. */ 0957: extern int pthread_cond_destroy (pthread_cond_t *__cond) 0958: __THROW __nonnull ((1)); 0959: 0960: /* Wake up one thread waiting for condition variable COND. */ 0961: extern int pthread_cond_signal (pthread_cond_t *__cond) 0962: __THROWNL __nonnull ((1)); 0963: 0964: /* Wake up all threads waiting for condition variables COND. */ 0965: extern int pthread_cond_broadcast (pthread_cond_t *__cond) 0966: __THROWNL __nonnull ((1)); 0967: 0968: /* Wait for condition variable COND to be signaled or broadcast. 0969: MUTEX is assumed to be locked before. 0970: 0971: This function is a cancellation point and therefore not marked with 0972: __THROW. */ 0973: extern int pthread_cond_wait (pthread_cond_t *__restrict __cond, 0974: pthread_mutex_t *__restrict __mutex) 0975: __nonnull ((1, 2)); 0976: 0977: /* Wait for condition variable COND to be signaled or broadcast until 0978: ABSTIME. MUTEX is assumed to be locked before. ABSTIME is an 0979: absolute time specification; zero is the beginning of the epoch 0980: (00:00:00 GMT, January 1, 1970). 0981: 0982: This function is a cancellation point and therefore not marked with 0983: __THROW. */ 0984: extern int pthread_cond_timedwait (pthread_cond_t *__restrict __cond, 0985: pthread_mutex_t *__restrict __mutex, 0986: __const struct timespec *__restrict 0987: __abstime) __nonnull ((1, 2, 3)); 0988: 0989: /* Functions for handling condition variable attributes. */ 0990: 0991: /* Initialize condition variable attribute ATTR. */ 0992: extern int pthread_condattr_init (pthread_condattr_t *__attr) 0993: __THROW __nonnull ((1)); 0994: 0995: /* Destroy condition variable attribute ATTR. */ 0996: extern int pthread_condattr_destroy (pthread_condattr_t *__attr) 0997: __THROW __nonnull ((1)); 0998: 0999: /* Get the process-shared flag of the condition variable attribute ATTR. */ 1000: extern int pthread_condattr_getpshared (__const pthread_condattr_t * 1001: __restrict __attr, 1002: int *__restrict __pshared) 1003: __THROW __nonnull ((1, 2)); 1004: 1005: /* Set the process-shared flag of the condition variable attribute ATTR. */ 1006: extern int pthread_condattr_setpshared (pthread_condattr_t *__attr, 1007: int __pshared) __THROW __nonnull ((1)); 1008: 1009: #ifdef __USE_XOPEN2K 1010: /* Get the clock selected for the conditon variable attribute ATTR. */ 1011: extern int pthread_condattr_getclock (__const pthread_condattr_t * 1012: __restrict __attr, 1013: __clockid_t *__restrict __clock_id) 1014: __THROW __nonnull ((1, 2)); 1015: 1016: /* Set the clock selected for the conditon variable attribute ATTR. */ 1017: extern int pthread_condattr_setclock (pthread_condattr_t *__attr, 1018: __clockid_t __clock_id) 1019: __THROW __nonnull ((1)); 1020: #endif 1021: 1022: 1023: #ifdef __USE_XOPEN2K 1024: /* Functions to handle spinlocks. */ 1025: 1026: /* Initialize the spinlock LOCK. If PSHARED is nonzero the spinlock can 1027: be shared between different processes. */ 1028: extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared) 1029: __THROW __nonnull ((1)); 1030: 1031: /* Destroy the spinlock LOCK. */ 1032: extern int pthread_spin_destroy (pthread_spinlock_t *__lock) 1033: __THROW __nonnull ((1)); 1034: 1035: /* Wait until spinlock LOCK is retrieved. */ 1036: extern int pthread_spin_lock (pthread_spinlock_t *__lock) 1037: __THROWNL __nonnull ((1)); 1038: 1039: /* Try to lock spinlock LOCK. */ 1040: extern int pthread_spin_trylock (pthread_spinlock_t *__lock) 1041: __THROWNL __nonnull ((1)); 1042: 1043: /* Release spinlock LOCK. */ 1044: extern int pthread_spin_unlock (pthread_spinlock_t *__lock) 1045: __THROWNL __nonnull ((1)); 1046: 1047: 1048: /* Functions to handle barriers. */ 1049: 1050: /* Initialize BARRIER with the attributes in ATTR. The barrier is 1051: opened when COUNT waiters arrived. */ 1052: extern int pthread_barrier_init (pthread_barrier_t *__restrict __barrier, 1053: __const pthread_barrierattr_t *__restrict 1054: __attr, unsigned int __count) 1055: __THROW __nonnull ((1)); 1056: 1057: /* Destroy a previously dynamically initialized barrier BARRIER. */ 1058: extern int pthread_barrier_destroy (pthread_barrier_t *__barrier) 1059: __THROW __nonnull ((1)); 1060: 1061: /* Wait on barrier BARRIER. */ 1062: extern int pthread_barrier_wait (pthread_barrier_t *__barrier) 1063: __THROWNL __nonnull ((1)); 1064: 1065: 1066: /* Initialize barrier attribute ATTR. */ 1067: extern int pthread_barrierattr_init (pthread_barrierattr_t *__attr) 1068: __THROW __nonnull ((1)); 1069: 1070: /* Destroy previously dynamically initialized barrier attribute ATTR. */ 1071: extern int pthread_barrierattr_destroy (pthread_barrierattr_t *__attr) 1072: __THROW __nonnull ((1)); 1073: 1074: /* Get the process-shared flag of the barrier attribute ATTR. */ 1075: extern int pthread_barrierattr_getpshared (__const pthread_barrierattr_t * 1076: __restrict __attr, 1077: int *__restrict __pshared) 1078: __THROW __nonnull ((1, 2)); 1079: 1080: /* Set the process-shared flag of the barrier attribute ATTR. */ 1081: extern int pthread_barrierattr_setpshared (pthread_barrierattr_t *__attr, 1082: int __pshared) 1083: __THROW __nonnull ((1)); 1084: #endif 1085: 1086: 1087: /* Functions for handling thread-specific data. */ 1088: 1089: /* Create a key value identifying a location in the thread-specific 1090: data area. Each thread maintains a distinct thread-specific data 1091: area. DESTR_FUNCTION, if non-NULL, is called with the value 1092: associated to that key when the key is destroyed. 1093: DESTR_FUNCTION is not called if the value associated is NULL when 1094: the key is destroyed. */ 1095: extern int pthread_key_create (pthread_key_t *__key, 1096: void (*__destr_function) (void *)) 1097: __THROW __nonnull ((1)); 1098: 1099: /* Destroy KEY. */ 1100: extern int pthread_key_delete (pthread_key_t __key) __THROW; 1101: 1102: /* Return current value of the thread-specific data slot identified by KEY. */ 1103: extern void *pthread_getspecific (pthread_key_t __key) __THROW; 1104: 1105: /* Store POINTER in the thread-specific data slot identified by KEY. */ 1106: extern int pthread_setspecific (pthread_key_t __key, 1107: __const void *__pointer) __THROW ; 1108: 1109: 1110: #ifdef __USE_XOPEN2K 1111: /* Get ID of CPU-time clock for thread THREAD_ID. */ 1112: extern int pthread_getcpuclockid (pthread_t __thread_id, 1113: __clockid_t *__clock_id) 1114: __THROW __nonnull ((2)); 1115: #endif 1116: 1117: 1118: /* Install handlers to be called when a new process is created with FORK. 1119: The PREPARE handler is called in the parent process just before performing 1120: FORK. The PARENT handler is called in the parent process just after FORK. 1121: The CHILD handler is called in the child process. Each of the three 1122: handlers can be NULL, meaning that no handler needs to be called at that 1123: point. 1124: PTHREAD_ATFORK can be called several times, in which case the PREPARE 1125: handlers are called in LIFO order (last added with PTHREAD_ATFORK, 1126: first called before FORK), and the PARENT and CHILD handlers are called 1127: in FIFO (first added, first called). */ 1128: 1129: extern int pthread_atfork (void (*__prepare) (void), 1130: void (*__parent) (void), 1131: void (*__child) (void)) __THROW; 1132: 1133: 1134: #ifdef __USE_EXTERN_INLINES 1135: /* Optimizations. */ 1136: __extern_inline int 1137: __NTH (pthread_equal (pthread_t __thread1, pthread_t __thread2)) 1138: { 1139: return __thread1 == __thread2; 1140: } 1141: #endif 1142: 1143: __END_DECLS 1144: 1145: #endif /* pthread.h */ 1146:
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