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Annotation of embedaddon/curl/lib/vtls/mbedtls_threadlock.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 2013 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
                      9:  * Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
                     10:  *
                     11:  * This software is licensed as described in the file COPYING, which
                     12:  * you should have received as part of this distribution. The terms
                     13:  * are also available at https://curl.haxx.se/docs/copyright.html.
                     14:  *
                     15:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
                     16:  * copies of the Software, and permit persons to whom the Software is
                     17:  * furnished to do so, under the terms of the COPYING file.
                     18:  *
                     19:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
                     20:  * KIND, either express or implied.
                     21:  *
                     22:  ***************************************************************************/
                     23: #include "curl_setup.h"
                     24: 
                     25: #if defined(USE_MBEDTLS) &&                                     \
                     26:   ((defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)) ||   \
                     27:    (defined(USE_THREADS_WIN32) && defined(HAVE_PROCESS_H)))
                     28: 
                     29: #if defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)
                     30: #  include <pthread.h>
                     31: #  define MBEDTLS_MUTEX_T pthread_mutex_t
                     32: #elif defined(USE_THREADS_WIN32) && defined(HAVE_PROCESS_H)
                     33: #  include <process.h>
                     34: #  define MBEDTLS_MUTEX_T HANDLE
                     35: #endif
                     36: 
                     37: #include "mbedtls_threadlock.h"
                     38: #include "curl_printf.h"
                     39: #include "curl_memory.h"
                     40: /* The last #include file should be: */
                     41: #include "memdebug.h"
                     42: 
                     43: /* number of thread locks */
                     44: #define NUMT                    2
                     45: 
                     46: /* This array will store all of the mutexes available to Mbedtls. */
                     47: static MBEDTLS_MUTEX_T *mutex_buf = NULL;
                     48: 
                     49: int Curl_mbedtlsthreadlock_thread_setup(void)
                     50: {
                     51:   int i;
                     52: 
                     53:   mutex_buf = calloc(NUMT * sizeof(MBEDTLS_MUTEX_T), 1);
                     54:   if(!mutex_buf)
                     55:     return 0;     /* error, no number of threads defined */
                     56: 
                     57:   for(i = 0;  i < NUMT;  i++) {
                     58:     int ret;
                     59: #if defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)
                     60:     ret = pthread_mutex_init(&mutex_buf[i], NULL);
                     61:     if(ret)
                     62:       return 0; /* pthread_mutex_init failed */
                     63: #elif defined(USE_THREADS_WIN32) && defined(HAVE_PROCESS_H)
                     64:     mutex_buf[i] = CreateMutex(0, FALSE, 0);
                     65:     if(mutex_buf[i] == 0)
                     66:       return 0;  /* CreateMutex failed */
                     67: #endif /* USE_THREADS_POSIX && HAVE_PTHREAD_H */
                     68:   }
                     69: 
                     70:   return 1; /* OK */
                     71: }
                     72: 
                     73: int Curl_mbedtlsthreadlock_thread_cleanup(void)
                     74: {
                     75:   int i;
                     76: 
                     77:   if(!mutex_buf)
                     78:     return 0; /* error, no threads locks defined */
                     79: 
                     80:   for(i = 0; i < NUMT; i++) {
                     81:     int ret;
                     82: #if defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)
                     83:     ret = pthread_mutex_destroy(&mutex_buf[i]);
                     84:     if(ret)
                     85:       return 0; /* pthread_mutex_destroy failed */
                     86: #elif defined(USE_THREADS_WIN32) && defined(HAVE_PROCESS_H)
                     87:     ret = CloseHandle(mutex_buf[i]);
                     88:     if(!ret)
                     89:       return 0; /* CloseHandle failed */
                     90: #endif /* USE_THREADS_POSIX && HAVE_PTHREAD_H */
                     91:   }
                     92:   free(mutex_buf);
                     93:   mutex_buf = NULL;
                     94: 
                     95:   return 1; /* OK */
                     96: }
                     97: 
                     98: int Curl_mbedtlsthreadlock_lock_function(int n)
                     99: {
                    100:   if(n < NUMT) {
                    101:     int ret;
                    102: #if defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)
                    103:     ret = pthread_mutex_lock(&mutex_buf[n]);
                    104:     if(ret) {
                    105:       DEBUGF(fprintf(stderr,
                    106:                      "Error: mbedtlsthreadlock_lock_function failed\n"));
                    107:       return 0; /* pthread_mutex_lock failed */
                    108:     }
                    109: #elif defined(USE_THREADS_WIN32) && defined(HAVE_PROCESS_H)
                    110:     ret = (WaitForSingleObject(mutex_buf[n], INFINITE) == WAIT_FAILED?1:0);
                    111:     if(ret) {
                    112:       DEBUGF(fprintf(stderr,
                    113:                      "Error: mbedtlsthreadlock_lock_function failed\n"));
                    114:       return 0; /* pthread_mutex_lock failed */
                    115:     }
                    116: #endif /* USE_THREADS_POSIX && HAVE_PTHREAD_H */
                    117:   }
                    118:   return 1; /* OK */
                    119: }
                    120: 
                    121: int Curl_mbedtlsthreadlock_unlock_function(int n)
                    122: {
                    123:   if(n < NUMT) {
                    124:     int ret;
                    125: #if defined(USE_THREADS_POSIX) && defined(HAVE_PTHREAD_H)
                    126:     ret = pthread_mutex_unlock(&mutex_buf[n]);
                    127:     if(ret) {
                    128:       DEBUGF(fprintf(stderr,
                    129:                      "Error: mbedtlsthreadlock_unlock_function failed\n"));
                    130:       return 0; /* pthread_mutex_unlock failed */
                    131:     }
                    132: #elif defined(USE_THREADS_WIN32) && defined(HAVE_PROCESS_H)
                    133:     ret = ReleaseMutex(mutex_buf[n]);
                    134:     if(!ret) {
                    135:       DEBUGF(fprintf(stderr,
                    136:                      "Error: mbedtlsthreadlock_unlock_function failed\n"));
                    137:       return 0; /* pthread_mutex_lock failed */
                    138:     }
                    139: #endif /* USE_THREADS_POSIX && HAVE_PTHREAD_H */
                    140:   }
                    141:   return 1; /* OK */
                    142: }
                    143: 
                    144: #endif /* USE_MBEDTLS */