00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024 #include <config.h>
00025 #include "dbus-internals.h"
00026 #include "dbus-sysdeps.h"
00027 #include "dbus-threads.h"
00028
00029 #include <sys/time.h>
00030 #include <pthread.h>
00031 #include <string.h>
00032
00033 #ifdef HAVE_ERRNO_H
00034 #include <errno.h>
00035 #endif
00036
00037 #include <config.h>
00038
00039
00040
00041
00042
00043
00044 static dbus_bool_t have_monotonic_clock = 0;
00045
00046 struct DBusRMutex {
00047 pthread_mutex_t lock;
00048 };
00049
00050 struct DBusCMutex {
00051 pthread_mutex_t lock;
00052 };
00053
00054 struct DBusCondVar {
00055 pthread_cond_t cond;
00056 };
00057
00058 #define DBUS_MUTEX(m) ((DBusMutex*) m)
00059 #define DBUS_MUTEX_PTHREAD(m) ((DBusMutexPThread*) m)
00060
00061 #define DBUS_COND_VAR(c) ((DBusCondVar*) c)
00062 #define DBUS_COND_VAR_PTHREAD(c) ((DBusCondVarPThread*) c)
00063
00064
00065 #ifdef DBUS_DISABLE_ASSERT
00066
00067 #define PTHREAD_CHECK(func_name, result_or_call) \
00068 do { int tmp = (result_or_call); if (tmp != 0) {;} } while (0)
00069 #else
00070 #define PTHREAD_CHECK(func_name, result_or_call) do { \
00071 int tmp = (result_or_call); \
00072 if (tmp != 0) { \
00073 _dbus_warn_check_failed ("pthread function %s failed with %d %s in %s\n", \
00074 func_name, tmp, strerror(tmp), _DBUS_FUNCTION_NAME); \
00075 } \
00076 } while (0)
00077 #endif
00078
00079 DBusCMutex *
00080 _dbus_platform_cmutex_new (void)
00081 {
00082 DBusCMutex *pmutex;
00083 int result;
00084
00085 pmutex = dbus_new (DBusCMutex, 1);
00086 if (pmutex == NULL)
00087 return NULL;
00088
00089 result = pthread_mutex_init (&pmutex->lock, NULL);
00090
00091 if (result == ENOMEM || result == EAGAIN)
00092 {
00093 dbus_free (pmutex);
00094 return NULL;
00095 }
00096 else
00097 {
00098 PTHREAD_CHECK ("pthread_mutex_init", result);
00099 }
00100
00101 return pmutex;
00102 }
00103
00104 DBusRMutex *
00105 _dbus_platform_rmutex_new (void)
00106 {
00107 DBusRMutex *pmutex;
00108 pthread_mutexattr_t mutexattr;
00109 int result;
00110
00111 pmutex = dbus_new (DBusRMutex, 1);
00112 if (pmutex == NULL)
00113 return NULL;
00114
00115 pthread_mutexattr_init (&mutexattr);
00116 pthread_mutexattr_settype (&mutexattr, PTHREAD_MUTEX_RECURSIVE);
00117 result = pthread_mutex_init (&pmutex->lock, &mutexattr);
00118 pthread_mutexattr_destroy (&mutexattr);
00119
00120 if (result == ENOMEM || result == EAGAIN)
00121 {
00122 dbus_free (pmutex);
00123 return NULL;
00124 }
00125 else
00126 {
00127 PTHREAD_CHECK ("pthread_mutex_init", result);
00128 }
00129
00130 return pmutex;
00131 }
00132
00133 void
00134 _dbus_platform_cmutex_free (DBusCMutex *mutex)
00135 {
00136 PTHREAD_CHECK ("pthread_mutex_destroy", pthread_mutex_destroy (&mutex->lock));
00137 dbus_free (mutex);
00138 }
00139
00140 void
00141 _dbus_platform_rmutex_free (DBusRMutex *mutex)
00142 {
00143 PTHREAD_CHECK ("pthread_mutex_destroy", pthread_mutex_destroy (&mutex->lock));
00144 dbus_free (mutex);
00145 }
00146
00147 void
00148 _dbus_platform_cmutex_lock (DBusCMutex *mutex)
00149 {
00150 PTHREAD_CHECK ("pthread_mutex_lock", pthread_mutex_lock (&mutex->lock));
00151 }
00152
00153 void
00154 _dbus_platform_rmutex_lock (DBusRMutex *mutex)
00155 {
00156 PTHREAD_CHECK ("pthread_mutex_lock", pthread_mutex_lock (&mutex->lock));
00157 }
00158
00159 void
00160 _dbus_platform_cmutex_unlock (DBusCMutex *mutex)
00161 {
00162 PTHREAD_CHECK ("pthread_mutex_unlock", pthread_mutex_unlock (&mutex->lock));
00163 }
00164
00165 void
00166 _dbus_platform_rmutex_unlock (DBusRMutex *mutex)
00167 {
00168 PTHREAD_CHECK ("pthread_mutex_unlock", pthread_mutex_unlock (&mutex->lock));
00169 }
00170
00171 DBusCondVar *
00172 _dbus_platform_condvar_new (void)
00173 {
00174 DBusCondVar *pcond;
00175 pthread_condattr_t attr;
00176 int result;
00177
00178 pcond = dbus_new (DBusCondVar, 1);
00179 if (pcond == NULL)
00180 return NULL;
00181
00182 pthread_condattr_init (&attr);
00183 #ifdef HAVE_MONOTONIC_CLOCK
00184 if (have_monotonic_clock)
00185 pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
00186 #endif
00187
00188 result = pthread_cond_init (&pcond->cond, &attr);
00189 pthread_condattr_destroy (&attr);
00190
00191 if (result == EAGAIN || result == ENOMEM)
00192 {
00193 dbus_free (pcond);
00194 return NULL;
00195 }
00196 else
00197 {
00198 PTHREAD_CHECK ("pthread_cond_init", result);
00199 }
00200
00201 return pcond;
00202 }
00203
00204 void
00205 _dbus_platform_condvar_free (DBusCondVar *cond)
00206 {
00207 PTHREAD_CHECK ("pthread_cond_destroy", pthread_cond_destroy (&cond->cond));
00208 dbus_free (cond);
00209 }
00210
00211 void
00212 _dbus_platform_condvar_wait (DBusCondVar *cond,
00213 DBusCMutex *mutex)
00214 {
00215 PTHREAD_CHECK ("pthread_cond_wait", pthread_cond_wait (&cond->cond, &mutex->lock));
00216 }
00217
00218 dbus_bool_t
00219 _dbus_platform_condvar_wait_timeout (DBusCondVar *cond,
00220 DBusCMutex *mutex,
00221 int timeout_milliseconds)
00222 {
00223 struct timeval time_now;
00224 struct timespec end_time;
00225 int result;
00226
00227 #ifdef HAVE_MONOTONIC_CLOCK
00228 if (have_monotonic_clock)
00229 {
00230 struct timespec monotonic_timer;
00231 clock_gettime (CLOCK_MONOTONIC,&monotonic_timer);
00232 time_now.tv_sec = monotonic_timer.tv_sec;
00233 time_now.tv_usec = monotonic_timer.tv_nsec / 1000;
00234 }
00235 else
00236
00237 #endif
00238 gettimeofday (&time_now, NULL);
00239
00240 end_time.tv_sec = time_now.tv_sec + timeout_milliseconds / 1000;
00241 end_time.tv_nsec = (time_now.tv_usec + (timeout_milliseconds % 1000) * 1000) * 1000;
00242 if (end_time.tv_nsec > 1000*1000*1000)
00243 {
00244 end_time.tv_sec += 1;
00245 end_time.tv_nsec -= 1000*1000*1000;
00246 }
00247
00248 result = pthread_cond_timedwait (&cond->cond, &mutex->lock, &end_time);
00249
00250 if (result != ETIMEDOUT)
00251 {
00252 PTHREAD_CHECK ("pthread_cond_timedwait", result);
00253 }
00254
00255
00256 return result != ETIMEDOUT;
00257 }
00258
00259 void
00260 _dbus_platform_condvar_wake_one (DBusCondVar *cond)
00261 {
00262 PTHREAD_CHECK ("pthread_cond_signal", pthread_cond_signal (&cond->cond));
00263 }
00264
00265 static void
00266 check_monotonic_clock (void)
00267 {
00268 #ifdef HAVE_MONOTONIC_CLOCK
00269 struct timespec dummy;
00270 if (clock_getres (CLOCK_MONOTONIC, &dummy) == 0)
00271 have_monotonic_clock = TRUE;
00272 #endif
00273 }
00274
00275 dbus_bool_t
00276 _dbus_threads_init_platform_specific (void)
00277 {
00278
00279
00280
00281
00282 check_monotonic_clock ();
00283 (void) _dbus_check_setuid ();
00284 return dbus_threads_init (NULL);
00285 }