graphicscomposition/openwfcompositionengine/adaptation/src/Platform/OS/symbian/owfmessagequeue.c
/* Copyright (c) 2009 The Khronos Group Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and/or associated documentation files (the
* "Materials"), to deal in the Materials without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Materials, and to
* permit persons to whom the Materials are furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Materials.
*
* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include "owfmessagequeue.h"
#include "owfmutex.h"
#include "owfsemaphore.h"
#include "owftypes.h"
#include "owfmemory.h"
#include "owfdebug.h"
#define LOCK_QUEUE(x) OWF_Mutex_Lock(&(x->mutex))
#define UNLOCK_QUEUE(x) OWF_Mutex_Unlock(&(x->mutex))
#define WAIT_TIL_THE_END_OF_TIME -1
OWF_API_CALL void
OWF_MessageQueue_Destroy(OWF_MESSAGE_QUEUE* queue)
{
if (!queue) {
return;
}
close(queue->read);
close(queue->write);
}
OWF_API_CALL OWFint
OWF_MessageQueue_Init(OWF_MESSAGE_QUEUE* queue)
{
OWFint err;
int handles[2];
OWF_ASSERT(queue);
queue->read = queue->write = -1;
err = pipe(handles);
if (err) {
return err;
}
queue->read = handles[0];
queue->write = handles[1];
return 0;
}
OWF_API_CALL void
OWF_Message_Send(OWF_MESSAGE_QUEUE* queue,
OWFuint msg,
void* data)
{
OWF_MESSAGE m;
OWF_ASSERT(queue);
m.id = msg;
m.data = data;
write(queue->write, &m, sizeof(OWF_MESSAGE));
}
static OWFint
OWF_Message_DoFetch(OWF_MESSAGE_QUEUE* queue,
OWF_MESSAGE* msg,
OWFint timeout)
{
/*
MUST BE CALLED FROM MUTEX
*/
OWF_ASSERT(queue);
OWF_ASSERT(msg);
if (timeout > -1)
{
OWFint r = 0;
fd_set s;
struct timeval to;
to.tv_sec = 0;
to.tv_usec = (suseconds_t) timeout;
FD_ZERO(&s);
FD_SET(queue->read, &s);
r = select(FD_SETSIZE, &s, NULL, NULL, &to);
if (r < 1)
{
return -1;
}
}
read(queue->read, msg, sizeof(OWF_MESSAGE));
return 0;
}
OWF_API_CALL OWFint
OWF_Message_Wait(OWF_MESSAGE_QUEUE* queue,
OWF_MESSAGE* msg,
OWFint timeout)
{
OWF_ASSERT(queue);
OWF_ASSERT(msg);
return OWF_Message_DoFetch(queue, msg, timeout);
}
#ifdef __cplusplus
}
#endif