103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
#include "capwap.h"
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#include "capwap_lock.h"
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#include "capwap_logging.h"
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#ifndef CAPWAP_MULTITHREADING_ENABLE
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#error "Warning: multithreading is disabled\n"
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#endif
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/* */
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int capwap_lock_init(capwap_lock_t* lock) {
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ASSERT(lock != NULL);
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memset(lock, 0, sizeof(capwap_lock_t));
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if (pthread_mutex_init(&lock->mutex, NULL) != 0) {
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return 0;
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}
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return 1;
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}
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#ifdef DEBUG
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/* */
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void capwap_lock_destroy_debug(capwap_lock_t* lock, const char* file, const int line) {
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int res;
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ASSERT(lock != NULL);
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res = pthread_mutex_trylock(&lock->mutex);
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if (!res) {
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pthread_mutex_unlock(&lock->mutex);
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} else if (res == EINVAL) {
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log_printf(LOG_DEBUG, "Attempt to destroy invalid mutex from '%s' (%d)", file, line);
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capwap_backtrace_callstack();
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} else if (res == EBUSY) {
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log_printf(LOG_DEBUG, "Attempt to destroy locked mutex by '%s' (%d) from '%s' (%d)", lock->file, lock->line, file, line);
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capwap_backtrace_callstack();
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}
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pthread_mutex_destroy(&lock->mutex);
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}
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/* */
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void capwap_lock_enter_debug(capwap_lock_t* lock, const char* file, const int line) {
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int res;
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time_t starttime;
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time_t waittime;
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time_t lasttime = 0;
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ASSERT(lock != NULL);
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/* */
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starttime = time(NULL);
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do {
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res = pthread_mutex_trylock(&lock->mutex);
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if (res == EBUSY) {
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waittime = time(NULL) - starttime;
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if (!(waittime % 5) && (waittime > lasttime)) {
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lasttime = waittime;
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log_printf(LOG_DEBUG, "Waited %d sec for mutex '%s' (%d) locked by '%s' (%d)", waittime, file, line, lock->file, lock->line);
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capwap_backtrace_callstack();
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}
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usleep(200);
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}
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} while (res == EBUSY);
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/* */
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lock->file = (char*)file;
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lock->line = (int)line;
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}
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/* */
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void capwap_lock_exit_debug(capwap_lock_t* lock, const char* file, const int line) {
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ASSERT(lock != NULL);
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/* */
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lock->file = NULL;
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lock->line = 0;
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/* */
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if (pthread_mutex_unlock(&lock->mutex)) {
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log_printf(LOG_DEBUG, "Error releasing mutex '%s' (%d)", file, line);
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capwap_backtrace_callstack();
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}
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}
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#else
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/* */
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void capwap_lock_destroy(capwap_lock_t* lock) {
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pthread_mutex_destroy(&lock->mutex);
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}
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/* */
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void capwap_lock_enter(capwap_lock_t* lock) {
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pthread_mutex_lock(&lock->mutex);
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}
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/* */
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void capwap_lock_exit(capwap_lock_t* lock) {
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pthread_mutex_unlock(&lock->mutex);
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}
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#endif
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