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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 "QemuPipeStream.h"
#include <hardware/qemu_pipe.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
QemuPipeStream::QemuPipeStream(size_t bufSize) :
IOStream(bufSize),
m_sock(-1),
m_bufsize(bufSize),
m_buf(NULL)
{
}
QemuPipeStream::QemuPipeStream(int sock, size_t bufSize) :
IOStream(bufSize),
m_sock(sock),
m_bufsize(bufSize),
m_buf(NULL)
{
}
QemuPipeStream::~QemuPipeStream()
{
if (m_sock >= 0) {
flush();
::close(m_sock);
}
if (m_buf != NULL) {
free(m_buf);
}
}
int QemuPipeStream::connect(void)
{
m_sock = qemu_pipe_open("opengles");
if (!valid()) return -1;
return 0;
}
void *QemuPipeStream::allocBuffer(size_t minSize)
{
size_t allocSize = (m_bufsize < minSize ? minSize : m_bufsize);
if (!m_buf) {
m_buf = (unsigned char *)malloc(allocSize);
}
else if (m_bufsize < allocSize) {
unsigned char *p = (unsigned char *)realloc(m_buf, allocSize);
if (p != NULL) {
m_buf = p;
m_bufsize = allocSize;
} else {
ERR("realloc (%d) failed\n", allocSize);
free(m_buf);
m_buf = NULL;
m_bufsize = 0;
}
}
return m_buf;
};
int QemuPipeStream::commitBuffer(size_t size)
{
return writeFully(m_buf, size);
}
int QemuPipeStream::writeFully(const void *buf, size_t len)
{
//DBG(">> QemuPipeStream::writeFully %d\n", len);
if (!valid()) return -1;
if (!buf) {
if (len>0) {
// If len is non-zero, buf must not be NULL. Otherwise the pipe would be
// in a corrupted state, which is lethal for the emulator.
ERR("QemuPipeStream::writeFully failed, buf=NULL, len %d,"
" lethal error, exiting", len);
abort();
}
return 0;
}
size_t res = len;
int retval = 0;
while (res > 0) {
ssize_t stat = ::write(m_sock, (const char *)(buf) + (len - res), res);
if (stat > 0) {
res -= stat;
continue;
}
if (stat == 0) { /* EOF */
ERR("QemuPipeStream::writeFully failed: premature EOF\n");
retval = -1;
break;
}
if (errno == EINTR) {
continue;
}
retval = stat;
ERR("QemuPipeStream::writeFully failed: %s, lethal error, exiting.\n",
strerror(errno));
abort();
}
//DBG("<< QemuPipeStream::writeFully %d\n", len );
return retval;
}
const unsigned char *QemuPipeStream::readFully(void *buf, size_t len)
{
//DBG(">> QemuPipeStream::readFully %d\n", len);
if (!valid()) return NULL;
if (!buf) {
if (len > 0) {
// If len is non-zero, buf must not be NULL. Otherwise the pipe would be
// in a corrupted state, which is lethal for the emulator.
ERR("QemuPipeStream::readFully failed, buf=NULL, len %zu, lethal"
" error, exiting.", len);
abort();
}
return NULL; // do not allow NULL buf in that implementation
}
size_t res = len;
while (res > 0) {
ssize_t stat = ::read(m_sock, (char *)(buf) + len - res, res);
if (stat == 0) {
// client shutdown;
return NULL;
} else if (stat < 0) {
if (errno == EINTR) {
continue;
} else {
ERR("QemuPipeStream::readFully failed (buf %p, len %zu"
", res %zu): %s, lethal error, exiting.", buf, len, res,
strerror(errno));
abort();
}
} else {
res -= stat;
}
}
//DBG("<< QemuPipeStream::readFully %d\n", len);
return (const unsigned char *)buf;
}
const unsigned char *QemuPipeStream::read( void *buf, size_t *inout_len)
{
//DBG(">> QemuPipeStream::read %d\n", *inout_len);
if (!valid()) return NULL;
if (!buf) {
ERR("QemuPipeStream::read failed, buf=NULL");
return NULL; // do not allow NULL buf in that implementation
}
int n = recv(buf, *inout_len);
if (n > 0) {
*inout_len = n;
return (const unsigned char *)buf;
}
//DBG("<< QemuPipeStream::read %d\n", *inout_len);
return NULL;
}
int QemuPipeStream::recv(void *buf, size_t len)
{
if (!valid()) return int(ERR_INVALID_SOCKET);
char* p = (char *)buf;
int ret = 0;
while(len > 0) {
int res = ::read(m_sock, p, len);
if (res > 0) {
p += res;
ret += res;
len -= res;
continue;
}
if (res == 0) { /* EOF */
break;
}
if (errno == EINTR)
continue;
/* A real error */
if (ret == 0)
ret = -1;
break;
}
return ret;
}
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