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- prefer clock_getttime() over gettimeofday() if available

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- use CLOCK_MONOTONIC for POSIX condition in Poco::Event and Poco::Semaphore if supported
This commit is contained in:
Guenter Obiltschnig
2016-08-11 12:45:29 +02:00
committed by Guenter Obiltschnig
parent 7b5e974b05
commit f89bea4411
4 changed files with 89 additions and 5 deletions
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40
Foundation/src/Semaphore_POSIX.cpp
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@@ -19,6 +19,7 @@
#include <timers.h>
#include <cstring>
#else
#include <time.h>
#include <sys/time.h>
#endif
@@ -39,8 +40,34 @@ SemaphoreImpl::SemaphoreImpl(int n, int max): _n(n), _max(max)
#endif
if (pthread_mutex_init(&_mutex, NULL))
throw SystemException("cannot create semaphore (mutex)");
if (pthread_cond_init(&_cond, NULL))
#if defined(__linux__) || defined(__QNX__)
pthread_condattr_t attr;
if (pthread_condattr_init(&attr))
{
pthread_mutex_destroy(&_mutex);
throw SystemException("cannot create semaphore (condition attribute)");
}
if (pthread_condattr_setclock(&attr, CLOCK_MONOTONIC))
{
pthread_condattr_destroy(&attr);
pthread_mutex_destroy(&_mutex);
throw SystemException("cannot create semaphore (condition attribute clock)");
}
if (pthread_cond_init(&_cond, &attr))
{
pthread_condattr_destroy(&attr);
pthread_mutex_destroy(&_mutex);
throw SystemException("cannot create semaphore (condition)");
}
pthread_condattr_destroy(&attr);
#else
if (pthread_cond_init(&_cond, NULL))
{
pthread_mutex_destroy(&_mutex);
throw SystemException("cannot create semaphore (condition)");
}
#endif
}
@@ -78,7 +105,16 @@ bool SemaphoreImpl::waitImpl(long milliseconds)
delta.tv_sec = milliseconds / 1000;
delta.tv_nsec = (milliseconds % 1000)*1000000;
pthread_get_expiration_np(&delta, &abstime);
#elif defined(POCO_VXWORKS)
#elif defined(__linux__) || defined(__QNX__)
clock_gettime(CLOCK_MONOTONIC, &abstime);
abstime.tv_sec += milliseconds / 1000;
abstime.tv_nsec += (milliseconds % 1000)*1000000;
if (abstime.tv_nsec >= 1000000000)
{
abstime.tv_nsec -= 1000000000;
abstime.tv_sec++;
}
#elif (defined(_POSIX_TIMERS) && defined(CLOCK_REALTIME)) || defined(POCO_VXWORKS)
clock_gettime(CLOCK_REALTIME, &abstime);
abstime.tv_sec += milliseconds / 1000;
abstime.tv_nsec += (milliseconds % 1000)*1000000;