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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "rsFifoSocket.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <poll.h>
#include <sys/types.h>
#include <sys/socket.h>
namespace android {
namespace renderscript {
FifoSocket::FifoSocket() {
mShutdown = false;
}
FifoSocket::~FifoSocket() {
}
bool FifoSocket::init(bool supportNonBlocking, bool supportReturnValues, size_t maxDataSize) {
int ret = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
return (ret == 0);
}
void FifoSocket::shutdown() {
mShutdown = true;
uint64_t d = 0;
::send(sv[0], &d, sizeof(d), 0);
::send(sv[1], &d, sizeof(d), 0);
close(sv[0]);
close(sv[1]);
}
bool FifoSocket::writeAsync(const void *data, size_t bytes, bool waitForSpace) {
if (bytes == 0) {
return true;
}
//ALOGE("writeAsync %p %i", data, bytes);
size_t ret = ::send(sv[0], data, bytes, 0);
rsAssert(ret == bytes);
if (ret != bytes) {
ALOGE("writeAsync %p %zu ret %zu", data, bytes, ret);
}
return true;
}
void FifoSocket::writeWaitReturn(void *retData, size_t retBytes) {
if (mShutdown) {
return;
}
//ALOGE("writeWaitReturn %p %i", retData, retBytes);
size_t ret = ::recv(sv[0], retData, retBytes, MSG_WAITALL);
//ALOGE("writeWaitReturn %i", ret);
rsAssert(ret == retBytes);
}
size_t FifoSocket::read(void *data, size_t bytes) {
if (mShutdown) {
return 0;
}
//ALOGE("read %p %i", data, bytes);
size_t ret = ::recv(sv[1], data, bytes, MSG_WAITALL);
rsAssert(ret == bytes || mShutdown);
//ALOGE("read ret %i bytes %i", ret, bytes);
if (mShutdown) {
ret = 0;
}
return ret;
}
bool FifoSocket::isEmpty() {
struct pollfd p;
p.fd = sv[1];
p.events = POLLIN;
int r = poll(&p, 1, 0);
//ALOGE("poll r=%i", r);
return r == 0;
}
void FifoSocket::readReturn(const void *data, size_t bytes) {
::send(sv[1], data, bytes, 0);
}
} // namespace renderscript
} // namespace android