171 lines
3.3 KiB
C++
171 lines
3.3 KiB
C++
|
|
// Event.cpp
|
|
|
|
// Implements the cEvent object representing an OS-specific synchronization primitive that can be waited-for
|
|
// Implemented as an Event on Win and as a 1-semaphore on *nix
|
|
|
|
#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
|
|
|
|
#include "Event.h"
|
|
|
|
|
|
|
|
|
|
|
|
cEvent::cEvent(void)
|
|
{
|
|
#ifdef _WIN32
|
|
m_Event = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
if (m_Event == NULL)
|
|
{
|
|
LOGERROR("cEvent: cannot create event, GLE = %d. Aborting server.", GetLastError());
|
|
abort();
|
|
}
|
|
#else // *nix
|
|
m_bIsNamed = false;
|
|
m_Event = new sem_t;
|
|
if (sem_init(m_Event, 0, 0))
|
|
{
|
|
// This path is used by MacOS, because it doesn't support unnamed semaphores.
|
|
delete m_Event;
|
|
m_bIsNamed = true;
|
|
|
|
AString EventName;
|
|
Printf(EventName, "cEvent%p", this);
|
|
m_Event = sem_open(EventName.c_str(), O_CREAT, 777, 0 );
|
|
if (m_Event == SEM_FAILED)
|
|
{
|
|
LOGERROR("cEvent: Cannot create event, errno = %i. Aborting server.", errno);
|
|
abort();
|
|
}
|
|
// Unlink the semaphore immediately - it will continue to function but will not pollute the namespace
|
|
// We don't store the name, so can't call this in the destructor
|
|
if (sem_unlink(EventName.c_str()) != 0)
|
|
{
|
|
LOGWARN("ERROR: Could not unlink cEvent. (%i)", errno);
|
|
}
|
|
}
|
|
#endif // *nix
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
cEvent::~cEvent()
|
|
{
|
|
#ifdef _WIN32
|
|
CloseHandle(m_Event);
|
|
#else
|
|
if (m_bIsNamed)
|
|
{
|
|
if (sem_close(m_Event) != 0)
|
|
{
|
|
LOGERROR("ERROR: Could not close cEvent. (%i)", errno);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sem_destroy(m_Event);
|
|
delete m_Event;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cEvent::Wait(void)
|
|
{
|
|
#ifdef _WIN32
|
|
DWORD res = WaitForSingleObject(m_Event, INFINITE);
|
|
if (res != WAIT_OBJECT_0)
|
|
{
|
|
LOGWARN("cEvent: waiting for the event failed: %d, GLE = %d. Continuing, but server may be unstable.", res, GetLastError());
|
|
}
|
|
#else
|
|
int res = sem_wait(m_Event);
|
|
if (res != 0 )
|
|
{
|
|
LOGWARN("cEvent: waiting for the event failed: %i, errno = %i. Continuing, but server may be unstable.", res, errno);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void cEvent::Set(void)
|
|
{
|
|
#ifdef _WIN32
|
|
if (!SetEvent(m_Event))
|
|
{
|
|
LOGWARN("cEvent: Could not set cEvent: GLE = %d", GetLastError());
|
|
}
|
|
#else
|
|
int res = sem_post(m_Event);
|
|
if (res != 0)
|
|
{
|
|
LOGWARN("cEvent: Could not set cEvent: %i, errno = %d", res, errno);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
cEvent::eWaitResult cEvent::Wait(int a_TimeoutMilliSec)
|
|
{
|
|
#ifdef _WIN32
|
|
DWORD res = WaitForSingleObject(m_Event, (DWORD)a_TimeoutMilliSec);
|
|
switch (res)
|
|
{
|
|
case WAIT_OBJECT_0:
|
|
{
|
|
// The semaphore was signalled
|
|
return wrSignalled;
|
|
}
|
|
case WAIT_TIMEOUT:
|
|
{
|
|
// The timeout was hit
|
|
return wrTimeout;
|
|
}
|
|
default:
|
|
{
|
|
LOGWARNING("cEvent: timed-waiting for the event failed: %d, GLE = %d. Continuing, but server may be unstable.", res, GetLastError());
|
|
return wrError;
|
|
}
|
|
}
|
|
#else
|
|
timespec timeout;
|
|
timeout.tv_sec = a_TimeoutMilliSec / 1000;
|
|
timeout.tv_nsec = (a_TimeoutMilliSec % 1000) * 1000000;
|
|
int res = sem_timedwait(m_Event, &timeout);
|
|
switch (res)
|
|
{
|
|
case 0:
|
|
{
|
|
// The semaphore was signalled
|
|
return wrSignalled;
|
|
}
|
|
case ETIMEDOUT:
|
|
{
|
|
// The timeout was hit
|
|
return wrTimeout;
|
|
}
|
|
default:
|
|
{
|
|
LOGWARNING("cEvent: timed-waiting for the event failed: %i, errno = %i. Continuing, but server may be unstable.", res, errno);
|
|
return wrError;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
|