Move emulator GLES from development.git to sdk.git

The emulator GLES support has two interfaces: a host shared library
interface used by QEMU, and a protocol between the platform and the
host. The host library interface is not versioned; QEMU and the GLES
renderer must match. The protocol on the other hand must be backwards
compatible: a new GLES renderer must support an older platform image.

Thus for branching purposes it makes more sense to put the GLES
renderer in sdk.git, which is branched along with qemu.git for SDK
releases. Platform images will be built against the protocol version
in the platform branch of sdk.git.

Change-Id: I2c3bce627ecfd0a4b3e688d1839fe10755a21e58

1 files changed, 190 insertions, 0 deletions

diff --git a/emulator/opengl/system/OpenglSystemCommon/QemuPipeStream.cpp b/emulator/opengl/system/OpenglSystemCommon/QemuPipeStream.cpp
new file mode 100644
index 0000000..50c3d8b
--- /dev/null
+++ b/emulator/opengl/system/OpenglSystemCommon/QemuPipeStream.cpp
@@ -0,0 +1,190 @@
+/*
+* 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) {
+        ::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;
+
+    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\n", strerror(errno));
+        break;
+    }
+    //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) ERR("QemuPipeStream::readFully failed, buf=NULL, len %d", len);
+        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, len);
+        if (stat == 0) {
+            // client shutdown;
+            return NULL;
+        } else if (stat < 0) {
+            if (errno == EINTR) {
+                continue;
+            } else {
+                ERR("QemuPipeStream::readFully failed (buf %p): %s\n",
+                    buf, strerror(errno));
+                return NULL;
+            }
+        } 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;
+}