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Annotation of embedaddon/curl/lib/curl_threads.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
                      9:  *
                     10:  * This software is licensed as described in the file COPYING, which
                     11:  * you should have received as part of this distribution. The terms
                     12:  * are also available at https://curl.haxx.se/docs/copyright.html.
                     13:  *
                     14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
                     15:  * copies of the Software, and permit persons to whom the Software is
                     16:  * furnished to do so, under the terms of the COPYING file.
                     17:  *
                     18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
                     19:  * KIND, either express or implied.
                     20:  *
                     21:  ***************************************************************************/
                     22: 
                     23: #include "curl_setup.h"
                     24: 
                     25: #include <curl/curl.h>
                     26: 
                     27: #if defined(USE_THREADS_POSIX)
                     28: #  ifdef HAVE_PTHREAD_H
                     29: #    include <pthread.h>
                     30: #  endif
                     31: #elif defined(USE_THREADS_WIN32)
                     32: #  ifdef HAVE_PROCESS_H
                     33: #    include <process.h>
                     34: #  endif
                     35: #endif
                     36: 
                     37: #include "curl_threads.h"
                     38: #include "curl_memory.h"
                     39: /* The last #include file should be: */
                     40: #include "memdebug.h"
                     41: 
                     42: #if defined(USE_THREADS_POSIX)
                     43: 
                     44: struct curl_actual_call {
                     45:   unsigned int (*func)(void *);
                     46:   void *arg;
                     47: };
                     48: 
                     49: static void *curl_thread_create_thunk(void *arg)
                     50: {
                     51:   struct curl_actual_call * ac = arg;
                     52:   unsigned int (*func)(void *) = ac->func;
                     53:   void *real_arg = ac->arg;
                     54: 
                     55:   free(ac);
                     56: 
                     57:   (*func)(real_arg);
                     58: 
                     59:   return 0;
                     60: }
                     61: 
                     62: curl_thread_t Curl_thread_create(unsigned int (*func) (void *), void *arg)
                     63: {
                     64:   curl_thread_t t = malloc(sizeof(pthread_t));
                     65:   struct curl_actual_call *ac = malloc(sizeof(struct curl_actual_call));
                     66:   if(!(ac && t))
                     67:     goto err;
                     68: 
                     69:   ac->func = func;
                     70:   ac->arg = arg;
                     71: 
                     72:   if(pthread_create(t, NULL, curl_thread_create_thunk, ac) != 0)
                     73:     goto err;
                     74: 
                     75:   return t;
                     76: 
                     77: err:
                     78:   free(t);
                     79:   free(ac);
                     80:   return curl_thread_t_null;
                     81: }
                     82: 
                     83: void Curl_thread_destroy(curl_thread_t hnd)
                     84: {
                     85:   if(hnd != curl_thread_t_null) {
                     86:     pthread_detach(*hnd);
                     87:     free(hnd);
                     88:   }
                     89: }
                     90: 
                     91: int Curl_thread_join(curl_thread_t *hnd)
                     92: {
                     93:   int ret = (pthread_join(**hnd, NULL) == 0);
                     94: 
                     95:   free(*hnd);
                     96:   *hnd = curl_thread_t_null;
                     97: 
                     98:   return ret;
                     99: }
                    100: 
                    101: #elif defined(USE_THREADS_WIN32)
                    102: 
                    103: /* !checksrc! disable SPACEBEFOREPAREN 1 */
                    104: curl_thread_t Curl_thread_create(unsigned int (CURL_STDCALL *func) (void *),
                    105:                                  void *arg)
                    106: {
                    107: #ifdef _WIN32_WCE
                    108:   typedef HANDLE curl_win_thread_handle_t;
                    109: #elif defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
                    110:   typedef unsigned long curl_win_thread_handle_t;
                    111: #else
                    112:   typedef uintptr_t curl_win_thread_handle_t;
                    113: #endif
                    114:   curl_thread_t t;
                    115:   curl_win_thread_handle_t thread_handle;
                    116: #ifdef _WIN32_WCE
                    117:   thread_handle = CreateThread(NULL, 0, func, arg, 0, NULL);
                    118: #else
                    119:   thread_handle = _beginthreadex(NULL, 0, func, arg, 0, NULL);
                    120: #endif
                    121:   t = (curl_thread_t)thread_handle;
                    122:   if((t == 0) || (t == LongToHandle(-1L))) {
                    123: #ifdef _WIN32_WCE
                    124:     DWORD gle = GetLastError();
                    125:     errno = ((gle == ERROR_ACCESS_DENIED ||
                    126:               gle == ERROR_NOT_ENOUGH_MEMORY) ?
                    127:              EACCES : EINVAL);
                    128: #endif
                    129:     return curl_thread_t_null;
                    130:   }
                    131:   return t;
                    132: }
                    133: 
                    134: void Curl_thread_destroy(curl_thread_t hnd)
                    135: {
                    136:   CloseHandle(hnd);
                    137: }
                    138: 
                    139: int Curl_thread_join(curl_thread_t *hnd)
                    140: {
                    141: #if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \
                    142:     (_WIN32_WINNT < _WIN32_WINNT_VISTA)
                    143:   int ret = (WaitForSingleObject(*hnd, INFINITE) == WAIT_OBJECT_0);
                    144: #else
                    145:   int ret = (WaitForSingleObjectEx(*hnd, INFINITE, FALSE) == WAIT_OBJECT_0);
                    146: #endif
                    147: 
                    148:   Curl_thread_destroy(*hnd);
                    149: 
                    150:   *hnd = curl_thread_t_null;
                    151: 
                    152:   return ret;
                    153: }
                    154: 
                    155: #endif /* USE_THREADS_* */