author | William Roberts <williamr@symbian.org> |
Wed, 31 Mar 2010 12:33:34 +0100 | |
branch | Symbian3 |
changeset 4 | 837f303aceeb |
parent 2 | 2fe1408b6811 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: POSIX thread exported header file |
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* |
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*/ |
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#ifndef PTHREAD_H |
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#define PTHREAD_H |
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#include <pthreadtypes.h> |
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#include <sched.h> |
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#include <e32def.h> |
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#include <stddef.h> |
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#include <time.h> |
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#include <limits.h> |
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#include <pthreadalias.h> |
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#define POSIX_THREAD_DESTRUCTOR_ITERATIONS 4 |
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#define POSIX_THREAD_KEYS_MAX 128 |
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#define PTHREAD_STACK_MIN 0x2000 |
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#define POSIX_THREAD_THREADS_MAX 64 |
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#define PTHREAD_THREADS_MAX 1024 |
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#define POSIX_SEM_NSEMS_MAX 256 |
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#define SEM_NSEMS_MAX 1024 |
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#define _POSIX_SEM_VALUE_MAX 32767 |
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#define SEM_VALUE_MAX INT_MAX |
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/* internal use*/ |
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typedef enum |
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{ |
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_ENeedsNormalInit =-3, |
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_ENeedsRecursiveInit, |
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_ENeedsErrorCheckInit, |
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_EInitialized =1, |
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_EDestroyed, |
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_EInvalid, |
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}_handle_state; |
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enum _LockStatus |
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{ |
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_ELockNotCreated, |
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_ELockCreating, |
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_ELockCreated, |
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}; |
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enum _OnceStatus |
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{ |
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_ENotDone, |
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_EDoing, |
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_EDone, |
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}; |
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typedef int pthread_once_t; |
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struct _pthread_mutex_t; |
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typedef struct |
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{ |
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_handle_state iState; |
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struct _pthread_mutex_t* iPtr; |
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int iReentry; |
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}pthread_mutex_t; |
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|
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typedef struct |
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{ |
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_handle_state iState; |
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int iSharedType; |
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int iMutexType; |
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}pthread_mutexattr_t; |
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struct _CondNode; |
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struct _CondQueue |
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{ |
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struct _CondNode* iHead; |
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struct _CondNode* iTail; |
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pthread_mutex_t iMutex; |
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}; |
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typedef struct |
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{ |
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_handle_state iState; |
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struct _CondQueue iQueue; |
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}pthread_cond_t; |
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typedef struct _pthread_condattr_t* pthread_condattr_t; |
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#define PTHREAD_ONCE_INIT _ENotDone |
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#define PTHREAD_MUTEX_INITIALIZER { _ENeedsNormalInit, NULL,0 } |
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#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP { _ENeedsRecursiveInit, NULL, 0 } |
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#define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP { _ENeedsErrorCheckInit, NULL,0 } |
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#define PTHREAD_COND_INITIALIZER { _ENeedsNormalInit, NULL,NULL } |
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enum |
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{ |
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PTHREAD_CREATE_JOINABLE = 0, /* Default */ |
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PTHREAD_CREATE_DETACHED = 1 |
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}; |
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enum |
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{ |
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PTHREAD_SCOPE_SYSTEM = 1 /* Default */ |
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}; |
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|
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117 |
enum |
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118 |
{ |
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PTHREAD_CANCEL_ASYNCHRONOUS = 0, |
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PTHREAD_CANCEL_DEFERRED = 1 /* Default */ |
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121 |
}; |
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122 |
|
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123 |
enum |
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124 |
{ |
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PTHREAD_PROCESS_PRIVATE = 0, |
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}; |
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127 |
|
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128 |
enum |
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129 |
{ |
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130 |
PTHREAD_MUTEX_NORMAL, |
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131 |
PTHREAD_MUTEX_RECURSIVE, |
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PTHREAD_MUTEX_ERRORCHECK, |
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PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL |
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}; |
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135 |
|
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136 |
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137 |
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138 |
#ifdef __cplusplus |
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extern "C" |
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140 |
{ |
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#endif /* __cplusplus */ |
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142 |
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typedef void * (*thread_begin_routine)(void *); |
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144 |
/* |
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145 |
This function creates a thread, with attributes specified by attrib, |
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within a process. If attrib is NULL, then default attributes will be used. |
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On successful completion, pthread_create() will store the ID of the |
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created thread in the location referenced by threadhdl. |
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149 |
*/ |
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150 |
IMPORT_C extern int pthread_create(pthread_t *threadhdl, pthread_attr_t *attrib, |
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thread_begin_routine begin_routine , void * param); |
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152 |
/* |
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This function return the handle to current thread. |
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154 |
*/ |
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155 |
IMPORT_C extern pthread_t pthread_self (); |
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156 |
|
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157 |
/* |
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Compare two thread handles |
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159 |
*/ |
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IMPORT_C extern int pthread_equal(pthread_t t1,pthread_t t2); |
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161 |
/* |
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162 |
Waiting for thread termination |
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163 |
*/ |
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IMPORT_C extern int pthread_join(pthread_t thHandle, void **retValPtr); |
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165 |
/* |
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166 |
detach from thread |
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167 |
*/ |
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IMPORT_C extern int pthread_detach(pthread_t thrHandle); |
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169 |
/* |
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exit current thread |
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171 |
*/ |
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172 |
IMPORT_C extern void pthread_exit(void *retValPtr); |
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173 |
/* |
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174 |
Initialise the thread attributes |
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175 |
*/ |
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IMPORT_C int pthread_attr_init(pthread_attr_t *attrib); |
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177 |
/* |
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178 |
Destroy the thread attributes |
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179 |
*/ |
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IMPORT_C int pthread_attr_destroy(pthread_attr_t *attrib); |
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181 |
/* |
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182 |
Get the detach_state of the current thread |
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183 |
*/ |
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184 |
IMPORT_C int pthread_attr_getdetachstate(const pthread_attr_t *attrib, |
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185 |
int *detState); |
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186 |
/* |
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187 |
Set the detach_state of the current thread |
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188 |
*/ |
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189 |
IMPORT_C int pthread_attr_setdetachstate(pthread_attr_t *attrib, |
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190 |
int detState); |
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191 |
/* |
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192 |
Get the stack size of the current thread |
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193 |
*/ |
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194 |
IMPORT_C int pthread_attr_getstacksize(const pthread_attr_t *attrib, |
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195 |
size_t *stkSize); |
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196 |
/* |
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197 |
Set the stack size of the current thread |
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198 |
*/ |
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199 |
IMPORT_C int pthread_attr_setstacksize(pthread_attr_t *attrib, |
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200 |
size_t stkSize); |
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201 |
|
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202 |
/* |
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203 |
This function ensures that a piece of initialization code is executed at most once. |
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204 |
The once_control argument must point to a static variable statically initialized to PTHREAD_ONCE_INIT |
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205 |
|
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206 |
*/ |
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207 |
typedef void (*thread_init_routine) (void); |
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208 |
IMPORT_C extern int pthread_once (pthread_once_t * once_control, |
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209 |
thread_init_routine init_routine); |
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210 |
|
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211 |
/* |
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212 |
extern int pthread_key_create (pthread_key_t * key, void (*destructor) (void *)); |
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213 |
extern int pthread_key_delete (pthread_key_t key); |
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214 |
extern int pthread_setspecific (pthread_key_t key, const void *value); |
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215 |
extern void* pthread_getspecific (pthread_key_t key); |
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216 |
*/ |
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217 |
|
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218 |
/* |
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219 |
This function initializes the mutex attribute object attr and fills it with default values for the attributes. |
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220 |
*/ |
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221 |
IMPORT_C extern int pthread_mutexattr_init (pthread_mutexattr_t * attr); |
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222 |
|
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223 |
/* |
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224 |
This function destroys the mutex attribute object attr and marks it as a destroyed object. |
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225 |
*/ |
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226 |
IMPORT_C extern int pthread_mutexattr_destroy (pthread_mutexattr_t * attr); |
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227 |
|
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228 |
/* |
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229 |
This function retrieves the current value of the process shared attribute in |
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230 |
attr and stores it in the location pointed to by pshared. |
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231 |
*/ |
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IMPORT_C extern int pthread_mutexattr_getpshared (const pthread_mutexattr_t* attr, int* pshared); |
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234 |
/* |
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This function sets the current value of the process shared attribute in attr to the value specifed in the |
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pshared variable. |
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*/ |
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IMPORT_C extern int pthread_mutexattr_setpshared (pthread_mutexattr_t * attr, int pshared); |
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/* |
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This function retrieves the current value of the mutex kind attribute in attr and |
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stores it in the location pointed to by type. |
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*/ |
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IMPORT_C extern int pthread_mutexattr_gettype (pthread_mutexattr_t * attr, int *type); |
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246 |
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247 |
/* |
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This function sets the current value of the mutex kind attribute in attr to the value specifed in the type variable. |
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*/ |
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IMPORT_C extern int pthread_mutexattr_settype (pthread_mutexattr_t * attr, int type); |
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/* |
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This function initializes the mutex object pointed to by mutex according to the mutex attributes specified in attr. |
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If attr is NULL, default attributes are used instead. |
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255 |
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*/ |
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IMPORT_C extern int pthread_mutex_init (pthread_mutex_t * mutex, const pthread_mutexattr_t * attr); |
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/* |
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This function destroys the mutex object. The mutex must be unlocked on entrance. |
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This implementation requires even statically initialized mutexes to be explicitly destroyed. |
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*/ |
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IMPORT_C extern int pthread_mutex_destroy (pthread_mutex_t * mutex); |
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This function locks the given mutex. If the mutex is currently |
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unlocked, it becomes locked and owned by the calling thread, and |
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this function returns immediately. If the mutex is already |
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locked by another thread, this function suspends the calling |
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thread until the mutex is unlocked. |
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|
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If the mutex is already locked by the calling thread, the behavior of |
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this function depends on the kind of the mutex. If the mutex is |
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of the PTHREAD_MUTEX_NORMAL or PTHREAD_MUTEX_DEFAULT kind, the calling thread is suspended until the mutex |
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is unlocked, thus effectively causing the calling thread to |
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deadlock. If the mutex is of the PTHREAD_MUTEX_ERRORCHECK kind, |
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this function returns immediately with the error code EDEADLK. |
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If the mutex is of the PTHREAD_MUTEX_RECURSIVE kind, this function |
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succeeds and returns immediately, recording the number of times the |
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calling thread has locked the mutex. An equal number of |
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pthread_mutex_unlock operations must be performed before the mutex |
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returns to the unlocked state. |
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*/ |
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IMPORT_C extern int pthread_mutex_lock (pthread_mutex_t * mutex); |
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285 |
|
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286 |
|
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287 |
/* |
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288 |
This function behaves identically to pthread_mutex_lock, except that if it cannot acquire the lock before |
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289 |
the abs_timeout time, the call returns with the error code ETIMEDOUT. |
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*/ |
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IMPORT_C extern int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *abstime); |
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292 |
|
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293 |
/* |
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294 |
This function behaves identically to pthread_mutex_lock, except that it does not |
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block the calling thread if the mutex is already locked by another thread (or by |
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296 |
the calling thread in the case of a PTHREAD_MUTEX_RECURSIVE mutex). Instead, pthread_mutex_trylock |
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297 |
returns immediately with the error code EAGAIN. |
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298 |
*/ |
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299 |
IMPORT_C extern int pthread_mutex_trylock (pthread_mutex_t * mutex); |
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300 |
|
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301 |
/* |
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302 |
This function unlocks the given mutex. The mutex is assumed |
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303 |
to be locked and owned by the calling thread on entrance to |
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304 |
this function. If the mutex is of the PTHREAD_MUTEX_NORMAL or PTHREAD_MUTEX_DEFAULT kind, |
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305 |
this function always returns it to the unlocked state. If it |
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is of the PTHREAD_MUTEX_RECURSIVE kind, it decrements the locking count of the |
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307 |
mutex (number of pthread_mutex_lock operations performed on it by |
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308 |
the calling thread), and only when this count reaches zero is the |
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309 |
mutex actually unlocked. |
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310 |
|
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311 |
On PTHREAD_MUTEX_ERRORCHECK mutexes, this function actually checks |
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312 |
at run-time that the mutex is locked on entrance, and that it was |
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313 |
locked by the same thread that is now calling pthread_mutex_unlock. |
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314 |
If these conditions are not met, an error code is returned and the |
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315 |
mutex remains unchanged. |
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316 |
*/ |
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317 |
IMPORT_C extern int pthread_mutex_unlock (pthread_mutex_t * mutex); |
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318 |
|
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319 |
/* |
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320 |
This function initializes the condition attribute object attr and |
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321 |
sets it with default values for the attributes. |
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322 |
*/ |
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323 |
IMPORT_C extern int pthread_condattr_init (pthread_condattr_t * /*attr*/); |
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324 |
|
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325 |
/* |
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326 |
This function destroys the condtion variable attribute object. |
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327 |
*/ |
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328 |
IMPORT_C extern int pthread_condattr_destroy (pthread_condattr_t * attr); |
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329 |
/* |
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330 |
extern int pthread_condattr_getpshared (const pthread_condattr_t * attr, int *pshared); |
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331 |
extern int pthread_condattr_setpshared (pthread_condattr_t * attr, int pshared); |
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332 |
*/ |
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333 |
|
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334 |
/* |
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335 |
This function initializes the condition variable object pointed to by cond |
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336 |
using the attributes of the attr variable. If attr is NULL, default attributes |
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337 |
are used instead. |
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338 |
*/ |
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339 |
IMPORT_C extern int pthread_cond_init (pthread_cond_t * cond, const pthread_condattr_t * /*attr*/); |
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340 |
|
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341 |
/* |
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342 |
This function destroys the condition variable object. |
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343 |
*/ |
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344 |
IMPORT_C extern int pthread_cond_destroy (pthread_cond_t * cond); |
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345 |
|
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346 |
/* |
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347 |
This function atomically unlocks mutex and waits on cond, |
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348 |
as pthread_cond_wait does, but it also bounds the duration |
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349 |
of the wait. If cond has not been signalled within the amount |
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350 |
of time specified by abstime, the mutex mutex is re-acquired and |
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351 |
pthread_cond_timedwait returns the error ETIMEDOUT. The abstime |
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352 |
parameter specifies an absolute time, with the same origin as time(2) and gettimeofday(2). |
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353 |
*/ |
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354 |
IMPORT_C extern int pthread_cond_timedwait (pthread_cond_t * cond,pthread_mutex_t * mutex,const struct timespec *abstime); |
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355 |
|
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356 |
/* |
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357 |
This function atomically unlocks the mutex (as per pthread_unlock_mutex) |
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358 |
and waits for the condition variable cond to be signalled. The thread |
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359 |
execution is suspended and does not consume any CPU time until the condition |
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360 |
variable is signalled. The mutex must be locked by the calling thread on entrance |
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361 |
to pthread_cond_wait. Before returning to the calling thread, pthread_cond_wait |
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362 |
re-acquires mutex (as per pthread_lock_mutex). |
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363 |
*/ |
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364 |
IMPORT_C extern int pthread_cond_wait (pthread_cond_t * cond, pthread_mutex_t * mutex); |
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365 |
|
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366 |
/* |
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367 |
This function restarts one of the threads that are waiting on the condition |
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368 |
variable cond. If no threads are waiting on cond, nothing happens. If several |
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369 |
threads are waiting on cond, exactly one is restarted. |
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370 |
|
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371 |
*/ |
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372 |
IMPORT_C extern int pthread_cond_signal (pthread_cond_t * cond); |
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373 |
|
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374 |
/* |
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375 |
This function restarts all the threads that are waiting on the |
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376 |
condition variable cond. Nothing happens if no threads are waiting on cond. |
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377 |
*/ |
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378 |
IMPORT_C extern int pthread_cond_broadcast (pthread_cond_t * cond); |
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|
379 |
|
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|
380 |
|
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|
381 |
typedef void (*destructor_routine)(void *); |
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382 |
/* |
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383 |
Thread-specific data key creation |
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|
384 |
*/ |
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385 |
IMPORT_C int pthread_key_create(pthread_key_t *key, destructor_routine dest); |
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|
386 |
|
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|
387 |
/* |
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|
388 |
Thread-specific data key deletion |
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|
389 |
*/ |
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390 |
IMPORT_C int pthread_key_delete(pthread_key_t key); |
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|
391 |
|
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|
392 |
/* |
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|
393 |
Setting Thread-specific data |
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|
394 |
*/ |
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|
395 |
IMPORT_C int pthread_setspecific(pthread_key_t key, const void *val); |
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|
396 |
|
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|
397 |
/* |
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|
398 |
Getting Thread-specific data |
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|
399 |
*/ |
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400 |
IMPORT_C void* pthread_getspecific(pthread_key_t key); |
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|
401 |
|
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|
402 |
/* |
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|
403 |
Getting contention scope |
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|
404 |
*/ |
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405 |
IMPORT_C int pthread_attr_getscope(const pthread_attr_t *attrib, |
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|
406 |
int* scope); |
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|
407 |
/* |
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|
408 |
Setting contention scope |
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|
409 |
*/ |
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|
410 |
IMPORT_C int pthread_attr_setscope(pthread_attr_t *attrib,int conscope); |
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|
411 |
|
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|
412 |
/* |
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|
413 |
Setting scheduling policy |
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|
414 |
*/ |
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|
415 |
IMPORT_C int pthread_attr_setschedpolicy(pthread_attr_t *attrib, |
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|
416 |
int policy); |
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|
417 |
|
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|
418 |
/* |
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|
419 |
Getting scheduling policy of the thread |
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|
420 |
*/ |
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|
421 |
IMPORT_C int pthread_attr_getschedpolicy(const pthread_attr_t *attrib, |
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|
422 |
int *policy); |
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|
423 |
|
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|
424 |
/* |
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|
425 |
Getting scheduling param of the thread |
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|
426 |
*/ |
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|
427 |
IMPORT_C int pthread_attr_getschedparam(const pthread_attr_t *attrib, |
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|
428 |
struct sched_param *param); |
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|
429 |
|
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|
430 |
/* |
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|
431 |
Setting scheduling param |
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|
432 |
*/ |
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433 |
IMPORT_C int pthread_attr_setschedparam(pthread_attr_t *attrib, |
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|
434 |
const struct sched_param *param); |
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|
435 |
|
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|
436 |
/* |
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|
437 |
Getting dynamic scheduling param of the thread |
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|
438 |
*/ |
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|
439 |
IMPORT_C int pthread_getschedparam(pthread_t thr, int *policy, |
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440 |
struct sched_param *param); |
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|
441 |
|
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|
442 |
/* |
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|
443 |
Dynamically Setting scheduling params |
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444 |
*/ |
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445 |
IMPORT_C int pthread_setschedparam(pthread_t th, int policy, |
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446 |
const struct sched_param *param); |
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|
447 |
|
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|
448 |
#ifdef __cplusplus |
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449 |
} /* End of "C" */ |
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450 |
#endif /* __cplusplus */ |
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451 |
|
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|
452 |
|
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|
453 |
#endif /* PTHREAD_H */ |
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454 |