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/* ScummVM - Scumm Interpreter
* Copyright (C) 2005 The ScummVM project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Header$
*
*/
#include "asyncfio.h"
#include <tamtypes.h>
#include <kernel.h>
#include <fileio.h>
#include <assert.h>
#include <string.h>
#include <fileXio_rpc.h>
#define DEFAULT_MODE (FIO_S_IRUSR | FIO_S_IWUSR | FIO_S_IRGRP | FIO_S_IWGRP | FIO_S_IROTH | FIO_S_IWOTH)
extern void sioprintf(const char *zFormat, ...);
AsyncFio::AsyncFio(void) {
_runningOp = NULL;
memset((int *)_ioSlots, 0, MAX_HANDLES * sizeof(int));
ee_sema_t newSema;
newSema.init_count = 1;
newSema.max_count = 1;
_ioSema = CreateSema(&newSema);
}
AsyncFio::~AsyncFio(void) {
DeleteSema(_ioSema);
}
int AsyncFio::open(const char *name, int ioMode) {
WaitSema(_ioSema);
checkSync();
int res;
fileXioOpen(name, ioMode, DEFAULT_MODE);
fileXioWaitAsync(FXIO_WAIT, &res);
SignalSema(_ioSema);
return res;
}
void AsyncFio::close(int handle) {
WaitSema(_ioSema);
checkSync();
fileXioClose(handle);
int res;
fileXioWaitAsync(FXIO_WAIT, &res);
if (res != 0) {
sioprintf("ERROR: fileXioClose failed, EC %d", res);
SleepThread();
}
_ioSlots[handle] = 0;
SignalSema(_ioSema);
}
void AsyncFio::checkSync(void) {
if (_runningOp) {
fileXioWaitAsync(FXIO_WAIT, (int *)_runningOp);
_runningOp = NULL;
}
}
void AsyncFio::read(int fd, void *dest, unsigned int len) {
WaitSema(_ioSema);
checkSync();
assert(fd < MAX_HANDLES);
_runningOp = _ioSlots + fd;
fileXioRead(fd, (unsigned char*)dest, len);
SignalSema(_ioSema);
}
void AsyncFio::write(int fd, const void *src, unsigned int len) {
WaitSema(_ioSema);
checkSync();
assert(fd < MAX_HANDLES);
_runningOp = _ioSlots + fd;
fileXioWrite(fd, (unsigned char*)src, len);
SignalSema(_ioSema);
}
int AsyncFio::seek(int fd, int offset, int whence) {
int res;
WaitSema(_ioSema);
checkSync();
fileXioLseek(fd, offset, whence);
fileXioWaitAsync(FXIO_WAIT, &res);
SignalSema(_ioSema);
return res;
}
int AsyncFio::mkdir(const char *name) {
int res;
WaitSema(_ioSema);
checkSync();
fileXioMkdir(name, DEFAULT_MODE);
fileXioWaitAsync(FXIO_WAIT, &res);
SignalSema(_ioSema);
return res;
}
int AsyncFio::dopen(const char *name) {
int res;
WaitSema(_ioSema);
checkSync();
fileXioDopen(name);
fileXioWaitAsync(FXIO_WAIT, &res);
SignalSema(_ioSema);
return res;
}
int AsyncFio::dread(int fd, iox_dirent_t *dest) {
int res;
WaitSema(_ioSema);
checkSync();
fileXioDread(fd, dest);
fileXioWaitAsync(FXIO_WAIT, &res);
SignalSema(_ioSema);
return res;
}
void AsyncFio::dclose(int fd) {
int res;
WaitSema(_ioSema);
checkSync();
fileXioDclose(fd);
fileXioWaitAsync(FXIO_WAIT, &res);
assert(res == 0);
SignalSema(_ioSema);
}
int AsyncFio::sync(int fd) {
WaitSema(_ioSema);
if (_runningOp == _ioSlots + fd)
checkSync();
int res = _ioSlots[fd];
_ioSlots[fd] = 0;
SignalSema(_ioSema);
return res;
}
bool AsyncFio::poll(int fd) {
bool retVal = false;
if (PollSema(_ioSema) >= 0) {
if (_runningOp == _ioSlots + fd) {
if (fileXioWaitAsync(FXIO_NOWAIT, (int *)_runningOp) == FXIO_COMPLETE) {
_runningOp = NULL;
retVal = true;
} else
retVal = false;
} else
retVal = true;
SignalSema(_ioSema);
}
return retVal;
}
bool AsyncFio::fioAvail(void) {
bool retVal = false;
if (PollSema(_ioSema) > 0) {
if (_runningOp) {
if (fileXioWaitAsync(FXIO_NOWAIT, (int *)_runningOp) == FXIO_COMPLETE) {
_runningOp = NULL;
retVal = true;
} else
retVal = false;
} else
retVal = true;
SignalSema(_ioSema);
}
return retVal;
}
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