25 #include "dbus-internals.h"    26 #include "dbus-sysdeps.h"    27 #include "dbus-threads.h"    39 #ifdef HAVE_MONOTONIC_CLOCK    60 #define DBUS_MUTEX(m)         ((DBusMutex*) m)    61 #define DBUS_MUTEX_PTHREAD(m) ((DBusMutexPThread*) m)    63 #define DBUS_COND_VAR(c)         ((DBusCondVar*) c)    64 #define DBUS_COND_VAR_PTHREAD(c) ((DBusCondVarPThread*) c)    67 #ifdef DBUS_DISABLE_ASSERT    69 #define PTHREAD_CHECK(func_name, result_or_call)    \    70     do { int tmp = (result_or_call); if (tmp != 0) {;} } while (0)    72 #define PTHREAD_CHECK(func_name, result_or_call) do {                                  \    73     int tmp = (result_or_call);                                                        \    75       _dbus_warn_check_failed ("pthread function %s failed with %d %s in %s\n",        \    76                                func_name, tmp, strerror(tmp), _DBUS_FUNCTION_NAME);    \    82 _dbus_platform_cmutex_new (
void)
    91   result = pthread_mutex_init (&pmutex->
lock, 
NULL);
    93   if (result == ENOMEM || result == EAGAIN)
   100       PTHREAD_CHECK (
"pthread_mutex_init", result);
   107 _dbus_platform_rmutex_new (
void)
   110   pthread_mutexattr_t mutexattr;
   117   pthread_mutexattr_init (&mutexattr);
   118   pthread_mutexattr_settype (&mutexattr, PTHREAD_MUTEX_RECURSIVE);
   119   result = pthread_mutex_init (&pmutex->
lock, &mutexattr);
   120   pthread_mutexattr_destroy (&mutexattr);
   122   if (result == ENOMEM || result == EAGAIN)
   129       PTHREAD_CHECK (
"pthread_mutex_init", result);
   136 _dbus_platform_cmutex_free (
DBusCMutex *mutex)
   138   PTHREAD_CHECK (
"pthread_mutex_destroy", pthread_mutex_destroy (&mutex->
lock));
   143 _dbus_platform_rmutex_free (
DBusRMutex *mutex)
   145   PTHREAD_CHECK (
"pthread_mutex_destroy", pthread_mutex_destroy (&mutex->
lock));
   150 _dbus_platform_cmutex_lock (
DBusCMutex *mutex)
   152   PTHREAD_CHECK (
"pthread_mutex_lock", pthread_mutex_lock (&mutex->
lock));
   156 _dbus_platform_rmutex_lock (
DBusRMutex *mutex)
   158   PTHREAD_CHECK (
"pthread_mutex_lock", pthread_mutex_lock (&mutex->
lock));
   162 _dbus_platform_cmutex_unlock (
DBusCMutex *mutex)
   164   PTHREAD_CHECK (
"pthread_mutex_unlock", pthread_mutex_unlock (&mutex->
lock));
   168 _dbus_platform_rmutex_unlock (
DBusRMutex *mutex)
   170   PTHREAD_CHECK (
"pthread_mutex_unlock", pthread_mutex_unlock (&mutex->
lock));
   174 _dbus_platform_condvar_new (
void)
   177   pthread_condattr_t attr;
   184   pthread_condattr_init (&attr);
   185 #ifdef HAVE_MONOTONIC_CLOCK   186   if (have_monotonic_clock)
   187     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
   190   result = pthread_cond_init (&pcond->
cond, &attr);
   191   pthread_condattr_destroy (&attr);
   193   if (result == EAGAIN || result == ENOMEM)
   200       PTHREAD_CHECK (
"pthread_cond_init", result);
   209   PTHREAD_CHECK (
"pthread_cond_destroy", pthread_cond_destroy (&cond->
cond));
   217   PTHREAD_CHECK (
"pthread_cond_wait", pthread_cond_wait (&cond->
cond, &mutex->
lock));
   221 _dbus_platform_condvar_wait_timeout (
DBusCondVar               *cond,
   223                                      int                        timeout_milliseconds)
   225   struct timeval time_now;
   226   struct timespec end_time;
   229 #ifdef HAVE_MONOTONIC_CLOCK   230   if (have_monotonic_clock)
   232       struct timespec monotonic_timer;
   233       clock_gettime (CLOCK_MONOTONIC,&monotonic_timer);
   234       time_now.tv_sec = monotonic_timer.tv_sec;
   235       time_now.tv_usec = monotonic_timer.tv_nsec / 1000;
   240   gettimeofday (&time_now, 
NULL);
   242   end_time.tv_sec = time_now.tv_sec + timeout_milliseconds / 1000;
   243   end_time.tv_nsec = (time_now.tv_usec + (timeout_milliseconds % 1000) * 1000) * 1000;
   244   if (end_time.tv_nsec > 1000*1000*1000)
   246       end_time.tv_sec += 1;
   247       end_time.tv_nsec -= 1000*1000*1000;
   250   result = pthread_cond_timedwait (&cond->
cond, &mutex->
lock, &end_time);
   252   if (result != ETIMEDOUT)
   254       PTHREAD_CHECK (
"pthread_cond_timedwait", result);
   258   return result != ETIMEDOUT;
   262 _dbus_platform_condvar_wake_one (
DBusCondVar *cond)
   264   PTHREAD_CHECK (
"pthread_cond_signal", pthread_cond_signal (&cond->
cond));
   268 check_monotonic_clock (
void)
   270 #ifdef HAVE_MONOTONIC_CLOCK   271   struct timespec dummy;
   272   if (clock_getres (CLOCK_MONOTONIC, &dummy) == 0)
   273     have_monotonic_clock = 
TRUE;
   284   check_monotonic_clock ();
   290 static pthread_mutex_t init_mutex = PTHREAD_MUTEX_INITIALIZER;
   295   pthread_mutex_lock (&init_mutex);
   301   pthread_mutex_unlock (&init_mutex);
 #define NULL
A null pointer, defined appropriately for C or C++. 
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0(). 
#define dbus_new(type, count)
Safe macro for using dbus_malloc(). 
dbus_bool_t _dbus_check_setuid(void)
NOTE: If you modify this function, please also consider making the corresponding change in GLib...
dbus_bool_t _dbus_threads_init_platform_specific(void)
Initialize threads as in dbus_threads_init_default(), appropriately for the platform. 
pthread_mutex_t lock
the lock 
pthread_mutex_t lock
the lock 
void _dbus_threads_unlock_platform_specific(void)
Undo _dbus_threads_lock_platform_specific(). 
void _dbus_threads_lock_platform_specific(void)
Lock a static mutex used to protect _dbus_threads_init_platform_specific(). 
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE. 
#define TRUE
Expands to "1". 
pthread_cond_t cond
the condition