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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/proxy/image_data.h"
#if defined(OS_LINUX)
#include <sys/shm.h>
#endif
#if defined(OS_MACOSX)
#include <sys/stat.h>
#include <sys/mman.h>
#endif
namespace pp {
namespace proxy {
ImageData::ImageData(const PP_ImageDataDesc& desc, ImageHandle handle)
: desc_(desc),
handle_(handle),
mapped_data_(NULL) {
}
ImageData::~ImageData() {
Unmap();
}
ImageData* ImageData::AsImageData() {
return this;
}
void* ImageData::Map() {
#if defined(OS_WIN)
NOTIMPLEMENTED();
return NULL;
#elif defined(OS_MACOSX)
struct stat st;
if (fstat(handle_.fd, &st) != 0)
return NULL;
void* memory = mmap(NULL, st.st_size, PROT_READ | PROT_WRITE,
MAP_SHARED, handle_.fd, 0);
if (memory == MAP_FAILED)
return NULL;
mapped_data_ = memory;
return mapped_data_;
#else
return NULL;
int shmkey = handle_;
void* address = shmat(shmkey, NULL, 0);
// Mark for deletion in case we crash so the kernel will clean it up.
shmctl(shmkey, IPC_RMID, 0);
if (address == (void*)-1)
return NULL;
mapped_data_ = address;
return address;
#endif
}
void ImageData::Unmap() {
#if defined(OS_WIN)
NOTIMPLEMENTED();
#elif defined(OS_MACOSX)
if (mapped_data_) {
struct stat st;
if (fstat(handle_.fd, &st) == 0)
munmap(mapped_data_, st.st_size);
}
#else
if (mapped_data_)
shmdt(mapped_data_);
#endif
mapped_data_ = NULL;
}
#if defined(OS_WIN)
const ImageHandle ImageData::NullHandle = NULL;
#elif defined(OS_MACOSX)
const ImageHandle ImageData::NullHandle = ImageHandle();
#else
const ImageHandle ImageData::NullHandle = 0;
#endif
ImageHandle ImageData::HandleFromInt(int32_t i) {
#if defined(OS_WIN)
return reinterpret_cast<ImageHandle>(i);
#elif defined(OS_MACOSX)
return ImageHandle(i, false);
#else
return static_cast<ImageHandle>(i);
#endif
}
} // namespace proxy
} // namespace pp
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