RenderScript.cpp revision 69cccdf0659a193d6a75420ec745421fb5c436e6 
1/*
2 * Copyright (C) 2012 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#define LOG_TAG "libRS_cpp"
18
19#include <utils/Log.h>
20#include <malloc.h>
21#include <string.h>
22
23#include "RenderScript.h"
24#include "rs.h"
25
26using namespace android;
27using namespace renderscriptCpp;
28
29bool RenderScript::gInitialized = false;
30pthread_mutex_t RenderScript::gInitMutex = PTHREAD_MUTEX_INITIALIZER;
31
32RenderScript::RenderScript() {
33    mDev = NULL;
34    mContext = NULL;
35    mErrorFunc = NULL;
36    mMessageFunc = NULL;
37    mMessageRun = false;
38
39    memset(&mElements, 0, sizeof(mElements));
40}
41
42RenderScript::~RenderScript() {
43    mMessageRun = false;
44
45    rsContextDeinitToClient(mContext);
46
47    void *res = NULL;
48    int status = pthread_join(mMessageThreadId, &res);
49
50    rsContextDestroy(mContext);
51    mContext = NULL;
52    rsDeviceDestroy(mDev);
53    mDev = NULL;
54}
55
56bool RenderScript::init(int targetApi) {
57    mDev = rsDeviceCreate();
58    if (mDev == 0) {
59        ALOGE("Device creation failed");
60        return false;
61    }
62
63    mContext = rsContextCreate(mDev, 0, targetApi);
64    if (mContext == 0) {
65        ALOGE("Context creation failed");
66        return false;
67    }
68
69
70    pid_t mNativeMessageThreadId;
71
72    int status = pthread_create(&mMessageThreadId, NULL, threadProc, this);
73    if (status) {
74        ALOGE("Failed to start RenderScript message thread.");
75        return false;
76    }
77    // Wait for the message thread to be active.
78    while (!mMessageRun) {
79        usleep(1000);
80    }
81
82    return true;
83}
84
85void RenderScript::throwError(const char *err) const {
86    ALOGE("RS CPP error: %s", err);
87    int * v = NULL;
88    v[0] = 0;
89}
90
91
92void * RenderScript::threadProc(void *vrsc) {
93    RenderScript *rs = static_cast<RenderScript *>(vrsc);
94    size_t rbuf_size = 256;
95    void * rbuf = malloc(rbuf_size);
96
97    rsContextInitToClient(rs->mContext);
98    rs->mMessageRun = true;
99
100    while (rs->mMessageRun) {
101        size_t receiveLen = 0;
102        uint32_t usrID = 0;
103        uint32_t subID = 0;
104        RsMessageToClientType r = rsContextPeekMessage(rs->mContext,
105                                                       &receiveLen, sizeof(receiveLen),
106                                                       &usrID, sizeof(usrID));
107
108        if (receiveLen >= rbuf_size) {
109            rbuf_size = receiveLen + 32;
110            rbuf = realloc(rbuf, rbuf_size);
111        }
112        if (!rbuf) {
113            ALOGE("RenderScript::message handler realloc error %zu", rbuf_size);
114            // No clean way to recover now?
115        }
116        rsContextGetMessage(rs->mContext, rbuf, rbuf_size, &receiveLen, sizeof(receiveLen),
117                            &subID, sizeof(subID));
118
119        switch(r) {
120        case RS_MESSAGE_TO_CLIENT_ERROR:
121            ALOGE("RS Error %s", (const char *)rbuf);
122
123            if(rs->mMessageFunc != NULL) {
124                rs->mErrorFunc(usrID, (const char *)rbuf);
125            }
126            break;
127        case RS_MESSAGE_TO_CLIENT_EXCEPTION:
128            // teardown. But we want to avoid starving other threads during
129            // teardown by yielding until the next line in the destructor can
130            // execute to set mRun = false
131            usleep(1000);
132            break;
133        case RS_MESSAGE_TO_CLIENT_USER:
134            if(rs->mMessageFunc != NULL) {
135                rs->mMessageFunc(usrID, rbuf, receiveLen);
136            } else {
137                ALOGE("Received a message from the script with no message handler installed.");
138            }
139            break;
140
141        default:
142            ALOGE("RenderScript unknown message type %i", r);
143        }
144    }
145
146    if (rbuf) {
147        free(rbuf);
148    }
149    ALOGE("RenderScript Message thread exiting.");
150    return NULL;
151}
152
153void RenderScript::setErrorHandler(ErrorHandlerFunc_t func) {
154    mErrorFunc = func;
155}
156
157void RenderScript::setMessageHandler(MessageHandlerFunc_t func) {
158    mMessageFunc  = func;
159}
160
161void RenderScript::contextDump() {
162}
163
164void RenderScript::finish() {
165
166}
167
168
169