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