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
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <ctype.h>
22 #include <unistd.h>
23 #include <poll.h>
24 #include <sys/types.h>
25 #include <sys/socket.h>
26
27 using namespace android;
28 using namespace android::renderscript;
29
FifoSocket()30 FifoSocket::FifoSocket() {
31 mShutdown = false;
32 }
33
~FifoSocket()34 FifoSocket::~FifoSocket() {
35
36 }
37
init(bool supportNonBlocking,bool supportReturnValues,size_t maxDataSize)38 bool FifoSocket::init(bool supportNonBlocking, bool supportReturnValues, size_t maxDataSize) {
39 int ret = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
40 return false;
41 }
42
shutdown()43 void FifoSocket::shutdown() {
44 mShutdown = true;
45 uint64_t d = 0;
46 ::send(sv[0], &d, sizeof(d), 0);
47 ::send(sv[1], &d, sizeof(d), 0);
48 close(sv[0]);
49 close(sv[1]);
50 }
51
writeAsync(const void * data,size_t bytes,bool waitForSpace)52 bool FifoSocket::writeAsync(const void *data, size_t bytes, bool waitForSpace) {
53 if (bytes == 0) {
54 return true;
55 }
56 //ALOGE("writeAsync %p %i", data, bytes);
57 size_t ret = ::send(sv[0], data, bytes, 0);
58 rsAssert(ret == bytes);
59 if (ret != bytes) {
60 ALOGE("writeAsync %p %zu ret %zu", data, bytes, ret);
61 }
62 return true;
63 }
64
writeWaitReturn(void * retData,size_t retBytes)65 void FifoSocket::writeWaitReturn(void *retData, size_t retBytes) {
66 if (mShutdown) {
67 return;
68 }
69
70 //ALOGE("writeWaitReturn %p %i", retData, retBytes);
71 size_t ret = ::recv(sv[0], retData, retBytes, MSG_WAITALL);
72 //ALOGE("writeWaitReturn %i", ret);
73 rsAssert(ret == retBytes);
74 }
75
read(void * data,size_t bytes)76 size_t FifoSocket::read(void *data, size_t bytes) {
77 if (mShutdown) {
78 return 0;
79 }
80
81 //ALOGE("read %p %i", data, bytes);
82 size_t ret = ::recv(sv[1], data, bytes, MSG_WAITALL);
83 rsAssert(ret == bytes || mShutdown);
84 //ALOGE("read ret %i bytes %i", ret, bytes);
85 if (mShutdown) {
86 ret = 0;
87 }
88 return ret;
89 }
90
isEmpty()91 bool FifoSocket::isEmpty() {
92 struct pollfd p;
93 p.fd = sv[1];
94 p.events = POLLIN;
95 int r = poll(&p, 1, 0);
96 //ALOGE("poll r=%i", r);
97 return r == 0;
98 }
99
100
readReturn(const void * data,size_t bytes)101 void FifoSocket::readReturn(const void *data, size_t bytes) {
102 //ALOGE("readReturn %p %Zu", data, bytes);
103 size_t ret = ::send(sv[1], data, bytes, 0);
104 //ALOGE("readReturn %Zu", ret);
105 //rsAssert(ret == bytes);
106 }
107
108
109