1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "rsFifoSocket.h"
18#include "utils/Timers.h"
19#include "utils/StopWatch.h"
20
21#include <stdio.h>
22#include <stdlib.h>
23#include <ctype.h>
24#include <unistd.h>
25#include <poll.h>
26#include <sys/types.h>
27#include <sys/socket.h>
28
29using namespace android;
30using namespace android::renderscript;
31
32FifoSocket::FifoSocket() {
33    mShutdown = false;
34}
35
36FifoSocket::~FifoSocket() {
37
38}
39
40bool FifoSocket::init(bool supportNonBlocking, bool supportReturnValues, size_t maxDataSize) {
41    int ret = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
42    return false;
43}
44
45void FifoSocket::shutdown() {
46    mShutdown = true;
47    uint64_t d = 0;
48    ::send(sv[0], &d, sizeof(d), 0);
49    ::send(sv[1], &d, sizeof(d), 0);
50    close(sv[0]);
51    close(sv[1]);
52}
53
54bool FifoSocket::writeAsync(const void *data, size_t bytes, bool waitForSpace) {
55    if (bytes == 0) {
56        return true;
57    }
58    //ALOGE("writeAsync %p %i", data, bytes);
59    size_t ret = ::send(sv[0], data, bytes, 0);
60    rsAssert(ret == bytes);
61    if (ret != bytes) {
62        ALOGE("writeAsync %p %zu  ret %zu", data, bytes, ret);
63    }
64    return true;
65}
66
67void FifoSocket::writeWaitReturn(void *retData, size_t retBytes) {
68    if (mShutdown) {
69        return;
70    }
71
72    //ALOGE("writeWaitReturn %p %i", retData, retBytes);
73    size_t ret = ::recv(sv[0], retData, retBytes, MSG_WAITALL);
74    //ALOGE("writeWaitReturn %i", ret);
75    rsAssert(ret == retBytes);
76}
77
78size_t FifoSocket::read(void *data, size_t bytes) {
79    if (mShutdown) {
80        return 0;
81    }
82
83    //ALOGE("read %p %i", data, bytes);
84    size_t ret = ::recv(sv[1], data, bytes, MSG_WAITALL);
85    rsAssert(ret == bytes || mShutdown);
86    //ALOGE("read ret %i  bytes %i", ret, bytes);
87    if (mShutdown) {
88        ret = 0;
89    }
90    return ret;
91}
92
93bool FifoSocket::isEmpty() {
94    struct pollfd p;
95    p.fd = sv[1];
96    p.events = POLLIN;
97    int r = poll(&p, 1, 0);
98    //ALOGE("poll r=%i", r);
99    return r == 0;
100}
101
102
103void FifoSocket::readReturn(const void *data, size_t bytes) {
104    //ALOGE("readReturn %p %Zu", data, bytes);
105    size_t ret = ::send(sv[1], data, bytes, 0);
106    //ALOGE("readReturn %Zu", ret);
107    //rsAssert(ret == bytes);
108}
109
110
111