Changeset 581 for trunk/libs/libpthread
- Timestamp:
- Oct 10, 2018, 3:11:53 PM (6 years ago)
- Location:
- trunk/libs/libpthread
- Files:
-
- 2 edited
Legend:
- Unmodified
- Added
- Removed
-
trunk/libs/libpthread/pthread.c
r573 r581 31 31 #include <syscalls_numbers.h> 32 32 33 #define PTHREAD_BARRIER_DEBUG 034 33 35 34 //////////////////////////////////////////////////////////////////////////////////////////// … … 73 72 } 74 73 75 /////////////////// 74 ///////////////////////// 76 75 int pthread_yield( void ) 77 76 { … … 80 79 81 80 //////////////////////////////////////////////////////////////////////////////////////////// 81 // Mutexes 82 //////////////////////////////////////////////////////////////////////////////////////////// 83 84 ////////////////////////////////////////////////////////// 85 int pthread_mutex_init( pthread_mutex_t * mutex, 86 const pthread_mutexattr_t * attr ) 87 { 88 if( attr != NULL ) 89 { 90 printf("\n[ERROR] in %s : <attr> argument not supported\n", __FUNCTION__); 91 return -1; 92 } 93 94 return hal_user_syscall( SYS_MUTEX, 95 (reg_t)mutex, 96 MUTEX_INIT, 97 0, 0 ); 98 } 99 100 //////////////////////////////////////////////////// 101 int pthread_mutex_destroy( pthread_mutex_t * mutex ) 102 { 103 return hal_user_syscall( SYS_MUTEX, 104 (reg_t)mutex, 105 MUTEX_DESTROY, 106 0, 0 ); 107 } 108 109 ///////////////////////////////////////////////// 110 int pthread_mutex_lock( pthread_mutex_t * mutex ) 111 { 112 return hal_user_syscall( SYS_MUTEX, 113 (reg_t)mutex, 114 MUTEX_LOCK, 115 0, 0 ); 116 } 117 118 //////////////////////////////////////////////////// 119 int pthread_mutex_trylock( pthread_mutex_t * mutex ) 120 { 121 return hal_user_syscall( SYS_MUTEX, 122 (reg_t)mutex, 123 MUTEX_TRYLOCK, 124 0, 0 ); 125 } 126 127 /////////////////////////////////////////////////// 128 int pthread_mutex_unlock( pthread_mutex_t * mutex ) 129 { 130 return hal_user_syscall( SYS_MUTEX, 131 (reg_t)mutex, 132 MUTEX_UNLOCK, 133 0, 0 ); 134 } 135 136 //////////////////////////////////////////////////////////////////////////////////////////// 137 // Condvars 138 //////////////////////////////////////////////////////////////////////////////////////////// 139 140 /////////////////////////////////////////////// 141 int pthread_cond_init( pthread_cond_t * cond, 142 pthread_condattr_t * attr ) 143 { 144 if( attr ) 145 { 146 printf("[ERROR] in %s ; <attr> argument must be NULL\n", __FUNCTION__ ); 147 return -1; 148 } 149 150 return hal_user_syscall( SYS_CONDVAR, 151 (reg_t)cond, 152 CONDVAR_INIT, 153 0, 0 ); 154 } 155 156 ///////////////////////////////////////////////// 157 int pthread_cond_destroy( pthread_cond_t * cond ) 158 { 159 return hal_user_syscall( SYS_CONDVAR, 160 (reg_t)cond, 161 CONDVAR_DESTROY, 162 0, 0 ); 163 } 164 165 ////////////////////////////////////////////// 166 int pthread_cond_wait( pthread_cond_t * cond, 167 pthread_mutex_t * mutex ) 168 { 169 return hal_user_syscall( SYS_CONDVAR, 170 (reg_t)cond, 171 CONDVAR_WAIT, 172 (reg_t)mutex, 173 0 ); 174 } 175 176 //////////////////////////////////////////////// 177 int pthread_cond_signal( pthread_cond_t * cond ) 178 { 179 return hal_user_syscall( SYS_CONDVAR, 180 (reg_t)cond, 181 CONDVAR_SIGNAL, 182 0, 0 ); 183 } 184 185 /////////////////////////////////////////////////// 186 int pthread_cond_broadcast( pthread_cond_t * cond ) 187 { 188 return hal_user_syscall( SYS_CONDVAR, 189 (reg_t)cond, 190 CONDVAR_BROADCAST, 191 0, 0 ); 192 } 193 194 195 //////////////////////////////////////////////////////////////////////////////////////////// 82 196 // Barriers 83 197 //////////////////////////////////////////////////////////////////////////////////////////// 198 199 //////////////////////////////////////////////////////////////// 200 int pthread_barrier_init( pthread_barrier_t * barrier, 201 const pthread_barrierattr_t * attr, 202 unsigned int count ) 203 { 204 return hal_user_syscall( SYS_BARRIER, 205 (reg_t)barrier, 206 BARRIER_INIT, 207 (reg_t)count, 208 0 ); 209 } 210 211 ////////////////////////////////////////////////////////// 212 int pthread_barrier_destroy( pthread_barrier_t * barrier ) 213 { 214 return hal_user_syscall( SYS_BARRIER, 215 (reg_t)barrier, 216 BARRIER_DESTROY, 217 0, 0 ); 218 } 219 220 /////////////////////////////////////////////////////// 221 int pthread_barrier_wait( pthread_barrier_t * barrier ) 222 { 223 return hal_user_syscall( SYS_BARRIER, 224 (reg_t)barrier, 225 BARRIER_WAIT, 226 0, 0 ); 227 } 228 229 /* 230 231 //////////////////////////////////////////////////////////////////////////////////////////// 232 // The following functions define another implementation for the POSX barrier 233 // based on a distributed quadtree implemented in user space, and relying 234 // on a busy waiting policy. 235 //////////////////////////////////////////////////////////////////////////////////////////// 236 84 237 85 238 //////////////////////////////////////////////////////////////////////////////////////////// … … 359 512 } // end pthread_barrier_wait() 360 513 361 //////////////////////////////////////////////////////////////////////////////////////////// 362 // Mutexes 363 //////////////////////////////////////////////////////////////////////////////////////////// 364 365 ////////////////////////////////////////////////////////// 366 int pthread_mutex_init( pthread_mutex_t * mutex, 367 const pthread_mutexattr_t * attr ) 368 { 369 if( attr != NULL ) 370 { 371 printf("\n[ERROR] in %s : <attr> argument not supported\n", __FUNCTION__); 372 return -1; 373 } 374 375 return hal_user_syscall( SYS_MUTEX, 376 (reg_t)mutex, 377 MUTEX_INIT, 378 0, 0 ); 379 } 380 381 //////////////////////////////////////////////////// 382 int pthread_mutex_destroy( pthread_mutex_t * mutex ) 383 { 384 return hal_user_syscall( SYS_MUTEX, 385 (reg_t)mutex, 386 MUTEX_DESTROY, 387 0, 0 ); 388 } 389 390 ///////////////////////////////////////////////// 391 int pthread_mutex_lock( pthread_mutex_t * mutex ) 392 { 393 return hal_user_syscall( SYS_MUTEX, 394 (reg_t)mutex, 395 MUTEX_LOCK, 396 0, 0 ); 397 } 398 399 //////////////////////////////////////////////////// 400 int pthread_mutex_trylock( pthread_mutex_t * mutex ) 401 { 402 return hal_user_syscall( SYS_MUTEX, 403 (reg_t)mutex, 404 MUTEX_TRYLOCK, 405 0, 0 ); 406 } 407 408 /////////////////////////////////////////////////// 409 int pthread_mutex_unlock( pthread_mutex_t * mutex ) 410 { 411 return hal_user_syscall( SYS_MUTEX, 412 (reg_t)mutex, 413 MUTEX_UNLOCK, 414 0, 0 ); 415 } 416 417 //////////////////////////////////////////////////////////////////////////////////////////// 418 // Condition variable 419 //////////////////////////////////////////////////////////////////////////////////////////// 420 421 /////////////////////////////////////////////// 422 int pthread_cond_init( pthread_cond_t * cond, 423 pthread_condattr_t * attr ) 424 { 425 if( attr ) 426 { 427 printf("[ERROR] in %s ; <attr> argument must be NULL\n", __FUNCTION__ ); 428 return -1; 429 } 430 431 return hal_user_syscall( SYS_CONDVAR, 432 (reg_t)cond, 433 CONDVAR_INIT, 434 0, 0 ); 435 } 436 437 ///////////////////////////////////////////////// 438 int pthread_cond_destroy( pthread_cond_t * cond ) 439 { 440 return hal_user_syscall( SYS_CONDVAR, 441 (reg_t)cond, 442 CONDVAR_DESTROY, 443 0, 0 ); 444 } 445 446 ////////////////////////////////////////////// 447 int pthread_cond_wait( pthread_cond_t * cond, 448 pthread_mutex_t * mutex ) 449 { 450 return hal_user_syscall( SYS_CONDVAR, 451 (reg_t)cond, 452 CONDVAR_WAIT, 453 (reg_t)mutex, 454 0 ); 455 } 456 457 //////////////////////////////////////////////// 458 int pthread_cond_signal( pthread_cond_t * cond ) 459 { 460 return hal_user_syscall( SYS_CONDVAR, 461 (reg_t)cond, 462 CONDVAR_SIGNAL, 463 0, 0 ); 464 } 465 466 /////////////////////////////////////////////////// 467 int pthread_cond_broadcast( pthread_cond_t * cond ) 468 { 469 return hal_user_syscall( SYS_CONDVAR, 470 (reg_t)cond, 471 CONDVAR_BROADCAST, 472 0, 0 ); 473 } 474 475 476 514 */ 477 515 478 516 -
trunk/libs/libpthread/pthread.h
r573 r581 25 25 #define _PTHREAD_H_ 26 26 27 #include <shared_pthread.h> 28 27 29 ////////////////////////////////////////////////////////////////////////////////////////////// 28 30 // POSIX thread related functions 29 // 30 // This include the thread creation/destruction, as well as the synchronisations: 31 // barriers, mutexes, and condition variables. 32 ////////////////////////////////////////////////////////////////////////////////////////////// 33 34 #include <shared_pthread.h> 31 ////////////////////////////////////////////////////////////////////////////////////////////// 35 32 36 33 /********************************************************************************************* … … 90 87 91 88 ////////////////////////////////////////////////////////////////////////////////////////////// 92 // POSIX barrier related functions 93 // 94 // These functions are implemented in user space. Only the pthread_barrier_init() function 95 // uses system calls to build the distributed quad-tree infrastructure. 96 ////////////////////////////////////////////////////////////////////////////////////////////// 97 98 /********************************************************************************************* 99 * These structures defines a hierarchical, POSIX compliant, barrier. 100 * - If the barrier attribute in the pthread_barrier_init() is NULL, it is implemented 101 * as a simple, sense reversing barrier, localised in the calling thread cluster. 102 * - If the barrier attribute is defined, it is implemented as a hierarchical, physically 103 * distributed quad-tree, covering all clusters specified, with the following constraints: 104 * . The involved clusters form a mesh [x_size * y_size] 105 * . The lower left involved cluster is cluster(0,0) 106 * . The number of threads per cluster is the same in all clusters. 107 * 108 * Implementation note: 109 * - The quad three is implemented as a three dimensions array of node[x][y][l] 110 * . [x][y] are the cluster coordinates / max values are (QDT_XMAX-1), (QDT_YMAX-1) 111 * . [l] is the node level / 0 for terminal nodes / (QDT_LMAX-1) for the root node 112 ********************************************************************************************/ 113 114 #define QDT_XMAX 16 /*! max number of clusters in a row */ 115 #define QDT_YMAX 16 /*! max number of clusters in a column */ 116 #define QDT_LMAX 5 /*! max depth of the quad tree */ 117 #define QDT_YWIDTH 4 /*! Y field in cxy, for cxy <=> (x,y) translation */ 118 #define QDT_YMASK 0xF /*! Y field in cxy, for cxy <=> (x,y) translation */ 119 120 typedef struct sqt_node_s 121 { 122 volatile unsigned int sense; /*! barrier state (toggle) */ 123 volatile unsigned int count; /*! number of not arrived tasks */ 124 unsigned int arity; /*! number of locally expected tasks */ 125 unsigned int level; /*! hierarchical level (0 is bottom) */ 126 struct sqt_node_s * parent; /*! pointer on parent node (NULL for root) */ 127 struct sqt_node_s * child[4]; /*! pointer on children node (NULL for bottom) */ 128 } 129 sqt_node_t; 130 131 typedef struct pthread_barrier_s 132 { 133 sqt_node_t * node[QDT_XMAX][QDT_YMAX][QDT_LMAX]; 134 } 135 pthread_barrier_t; 136 137 typedef struct pthread_barrierattr_s 138 { 139 unsigned int x_size; /*! number of clusters in a row (0 to x_size-1) */ 140 unsigned int y_size; /*! number of clusters in a column (0 to y_size-1) */ 141 unsigned int nthreads; /*! number of expected threads in a cluster */ 142 } 143 pthread_barrierattr_t; 89 // POSIX mutex related functions 90 ////////////////////////////////////////////////////////////////////////////////////////////// 91 92 /********************************************************************************************* 93 * This function initialise the mutex identified by the <mutex> argument. 94 * The <attr> argument is not supported yet, and must be NULL. 95 ********************************************************************************************* 96 * @ mutex : pointer on mutex in user space. 97 * @ attr : pointer on attributes structure / must be NULL. 98 * @ return 0 if success / return -1 if failure. 99 ********************************************************************************************/ 100 int pthread_mutex_init( pthread_mutex_t * mutex, 101 const pthread_mutexattr_t * attr ); 102 103 /********************************************************************************************* 104 * This function destroy the mutex identified by the <mutex> argument. 105 ********************************************************************************************* 106 * @ mutex : pointer on mutex in user space. 107 * @ return 0 if success / return -1 if failure. 108 ********************************************************************************************/ 109 int pthread_mutex_destroy( pthread_mutex_t * mutex ); 110 111 /********************************************************************************************* 112 * This bloking function locks the mutex identified by the <mutex> argument, 113 * and blocks until it becomes available. 114 ********************************************************************************************* 115 * @ mutex : pointer on mutex in user space. 116 * @ return 0 if success / return -1 if failure. 117 ********************************************************************************************/ 118 int pthread_mutex_lock( pthread_mutex_t * mutex ); 119 120 /********************************************************************************************* 121 * This function unlocks the mutex identified by the <mutex> argument. 122 ********************************************************************************************* 123 * @ mutex : pointer on mutex in user space. 124 * @ return 0 if success / return -1 if failure. 125 ********************************************************************************************/ 126 int pthread_mutex_unlock( pthread_mutex_t * mutex ); 127 128 /********************************************************************************************* 129 * This function tries to lock the mutex identified by the <mutex> argument, 130 * but don't block if the mutex is locked by another thread, including the current thread. 131 ********************************************************************************************* 132 * @ mutex : pointer on mutex in user space. 133 * @ return 0 if success / return -1 if mutex already taken. 134 ********************************************************************************************/ 135 int pthread_mutex_trylock( pthread_mutex_t * mutex ); 136 137 138 ////////////////////////////////////////////////////////////////////////////////////////////// 139 // POSIX condvar related functions 140 ////////////////////////////////////////////////////////////////////////////////////////////// 141 142 /********************************************************************************************* 143 * This function initializes a condition variable identified by the <cond> argument. 144 * WARNING: the <attr> argument is not supported and must be NULL. 145 ********************************************************************************************* 146 * @ cond : [in] pointer on condition in user space. 147 * @ attr : [in] pointer on condition attribute (must be NULL). 148 * @ return 0 if success / return -1 if failure. 149 ********************************************************************************************/ 150 int pthread_cond_init( pthread_cond_t * cond, 151 pthread_condattr_t * attr ); 152 153 /********************************************************************************************* 154 * This function atomically unlocks the <mutex> and blocks the calling thread on the 155 * condition specified by the <cond> argument. The thread unblocks only after another 156 * thread calls the pthread_cond_signal() or pthread_cond_broadcast() functions with the 157 * same condition variable. The mutex must be locked before calling this function, 158 * otherwise the behavior is undefined. Before the pthread_cond_wait() function returns 159 * to the calling function, it re-acquires the <mutex>. 160 ********************************************************************************************* 161 * @ cond : pointer on condition in user space. 162 * @ mutex : pointer on mutex in user space. 163 * @ return 0 if success / return -1 if failure. 164 ********************************************************************************************/ 165 int pthread_cond_wait( pthread_cond_t * cond, 166 pthread_mutex_t * mutex ); 167 168 /********************************************************************************************* 169 * This function unblocks one thread blocked on condition specified by the <cond> argument. 170 ********************************************************************************************* 171 * @ cond : pointer on condition in user space. 172 * @ return 0 if success / return -1 if failure. 173 ********************************************************************************************/ 174 int pthread_cond_signal( pthread_cond_t * cond ); 175 176 /********************************************************************************************* 177 * This function unblocks all threads blocked on condition specified by the <cond> argument. 178 ********************************************************************************************* 179 * @ cond : pointer on condition in user space. 180 * @ return 0 if success / return -1 if failure. 181 ********************************************************************************************/ 182 int pthread_cond_broadcast( pthread_cond_t * cond ); 183 184 /********************************************************************************************* 185 * This function delete the condition variable specified by the <cond> argument. 186 ********************************************************************************************* 187 * @ cond : pointer on condition in user space. 188 * @ return 0 if success / return -1 if failure. 189 ********************************************************************************************/ 190 int pthread_cond_destroy( pthread_cond_t * cond ); 191 192 193 ////////////////////////////////////////////////////////////////////////////////////////////// 194 // POSIX barrier related functions 195 ////////////////////////////////////////////////////////////////////////////////////////////// 144 196 145 197 /********************************************************************************************* … … 186 238 187 239 188 //////////////////////////////////////////////////////////////////////////////////////////////189 // POSIX mutex related functions190 //////////////////////////////////////////////////////////////////////////////////////////////191 192 /*********************************************************************************************193 * This function initialise the mutex identified by the <mutex> argument.194 * The <attr> argument is not supported yet, and must be NULL.195 *********************************************************************************************196 * @ mutex : pointer on mutex in user space.197 * @ attr : pointer on attributes structure / must be NULL.198 * @ return 0 if success / return -1 if failure.199 ********************************************************************************************/200 int pthread_mutex_init( pthread_mutex_t * mutex,201 const pthread_mutexattr_t * attr );202 203 /*********************************************************************************************204 * This function destroy the mutex identified by the <mutex> argument.205 *********************************************************************************************206 * @ mutex : pointer on mutex in user space.207 * @ return 0 if success / return -1 if failure.208 ********************************************************************************************/209 int pthread_mutex_destroy( pthread_mutex_t * mutex );210 211 /*********************************************************************************************212 * This bloking function locks the mutex identified by the <mutex> argument,213 * and blocks until it becomes available.214 *********************************************************************************************215 * @ mutex : pointer on mutex in user space.216 * @ return 0 if success / return -1 if failure.217 ********************************************************************************************/218 int pthread_mutex_lock( pthread_mutex_t * mutex );219 220 /*********************************************************************************************221 * This function unlocks the mutex identified by the <mutex> argument.222 *********************************************************************************************223 * @ mutex : pointer on mutex in user space.224 * @ return 0 if success / return -1 if failure.225 ********************************************************************************************/226 int pthread_mutex_unlock( pthread_mutex_t * mutex );227 228 /*********************************************************************************************229 * This function tries to lock the mutex identified by the <mutex> argument,230 * but don't block if the mutex is locked by another thread, including the current thread.231 *********************************************************************************************232 * @ mutex : pointer on mutex in user space.233 * @ return 0 if success / return -1 if mutex already taken.234 ********************************************************************************************/235 int pthread_mutex_trylock( pthread_mutex_t * mutex );236 237 238 //////////////////////////////////////////////////////////////////////////////////////////////239 // POSIX condvar related functions240 //////////////////////////////////////////////////////////////////////////////////////////////241 242 /*********************************************************************************************243 * This function initializes a condition variable identified by the <cond> argument.244 * WARNING: the <attr> argument is not supported and must be NULL.245 *********************************************************************************************246 * @ cond : [in] pointer on condition in user space.247 * @ attr : [in] pointer on condition attribute (must be NULL).248 * @ return 0 if success / return -1 if failure.249 ********************************************************************************************/250 int pthread_cond_init( pthread_cond_t * cond,251 pthread_condattr_t * attr );252 253 /*********************************************************************************************254 * This function atomically unlocks the <mutex> and blocks the calling thread on the255 * condition specified by the <cond> argument. The thread unblocks only after another256 * thread calls the pthread_cond_signal() or pthread_cond_broadcast() functions with the257 * same condition variable. The mutex must be locked before calling this function,258 * otherwise the behavior is undefined. Before the pthread_cond_wait() function returns259 * to the calling function, it re-acquires the <mutex>.260 *********************************************************************************************261 * @ cond : pointer on condition in user space.262 * @ mutex : pointer on mutex in user space.263 * @ return 0 if success / return -1 if failure.264 ********************************************************************************************/265 int pthread_cond_wait( pthread_cond_t * cond,266 pthread_mutex_t * mutex );267 268 /*********************************************************************************************269 * This function unblocks one thread blocked on condition specified by the <cond> argument.270 *********************************************************************************************271 * @ cond : pointer on condition in user space.272 * @ return 0 if success / return -1 if failure.273 ********************************************************************************************/274 int pthread_cond_signal( pthread_cond_t * cond );275 276 /*********************************************************************************************277 * This function unblocks all threads blocked on condition specified by the <cond> argument.278 *********************************************************************************************279 * @ cond : pointer on condition in user space.280 * @ return 0 if success / return -1 if failure.281 ********************************************************************************************/282 int pthread_cond_broadcast( pthread_cond_t * cond );283 284 /*********************************************************************************************285 * This function delete the condition variable specified by the <cond> argument.286 *********************************************************************************************287 * @ cond : pointer on condition in user space.288 * @ return 0 if success / return -1 if failure.289 ********************************************************************************************/290 int pthread_cond_destroy( pthread_cond_t * cond );291 292 293 240 294 241 #endif // _PTHREAD_H_
Note: See TracChangeset
for help on using the changeset viewer.