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/*
NET2 is a threaded, event based, network IO library for SDL.
Copyright (C) 2002 Bob Pendleton
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1
of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA
If you do not wish to comply with the terms of the LGPL please
contact the author as other terms are available for a fee.
Bob Pendleton
Bob@Pendleton.com
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL.h"
#include "SDL_thread.h"
#include "fastevents.h"
// ----------------------------------------
//
// error handling code
//
static char *error = NULL;
static __inline__ void
setError(char *err)
{
error = err;
}
char *
FE_GetError()
{
return error;
}
//----------------------------------------
//
// Threads, mutexs, thread utils, and
// thread safe wrappers
//
static SDL_mutex *eventLock = NULL;
static SDL_cond *eventWait = NULL;
static SDL_TimerID eventTimer = 0;
//----------------------------------------
//
//
//
int
FE_PushEvent(SDL_Event *ev)
{
SDL_LockMutex(eventLock);
while (-1 == SDL_PushEvent(ev))
SDL_CondWait(eventWait, eventLock);
SDL_CondSignal(eventWait);
SDL_UnlockMutex(eventLock);
return 1;
}
//----------------------------------------
//
//
//
void
FE_PumpEvents()
{
SDL_LockMutex(eventLock);
SDL_PumpEvents();
SDL_UnlockMutex(eventLock);
}
//----------------------------------------
//
//
//
int
FE_PollEvent(SDL_Event *event)
{
int val = 0;
SDL_LockMutex(eventLock);
val = SDL_PollEvent(event);
if (0 < val)
SDL_CondSignal(eventWait);
SDL_UnlockMutex(eventLock);
return val;
}
//----------------------------------------
//
// Replacement for SDL_WaitEvent
//
int
FE_WaitEvent(SDL_Event *event)
{
int val = 0;
SDL_LockMutex(eventLock);
while (0 >= (val = SDL_PollEvent(event)))
SDL_CondWait(eventWait, eventLock);
SDL_CondSignal(eventWait);
SDL_UnlockMutex(eventLock);
return val;
}
//----------------------------------------
//
//
//
static Uint32
timerCallback(Uint32 interval, void *param)
{
SDL_LockMutex(eventLock);
SDL_CondBroadcast(eventWait);
SDL_UnlockMutex(eventLock);
return interval;
}
//----------------------------------------
//
//
//
int
FE_Init()
{
if (0 == (SDL_INIT_TIMER & SDL_WasInit(SDL_INIT_TIMER)))
SDL_InitSubSystem(SDL_INIT_TIMER);
eventLock = SDL_CreateMutex();
if (NULL == eventLock) {
setError("FE: can't create a mutex");
return -1;
}
eventWait = SDL_CreateCond();
if (NULL == eventWait) {
setError("FE: can't create a condition variable");
return -1;
}
eventTimer = SDL_AddTimer(10, timerCallback, NULL);
if (NULL == eventTimer) {
setError("FE: can't add a timer");
return -1;
}
return 0;
}
//----------------------------------------
//
//
//
void
FE_Quit()
{
SDL_DestroyMutex(eventLock);
eventLock = NULL;
SDL_DestroyCond(eventWait);
eventWait = NULL;
SDL_RemoveTimer(eventTimer);
}
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