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Unified Diff: third_party/mojo/src/mojo/public/cpp/system/buffer.h

Issue 1410053006: Move third_party/mojo/src/mojo/public to mojo/public (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: merge Created 5 years, 1 month ago
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Index: third_party/mojo/src/mojo/public/cpp/system/buffer.h
diff --git a/third_party/mojo/src/mojo/public/cpp/system/buffer.h b/third_party/mojo/src/mojo/public/cpp/system/buffer.h
deleted file mode 100644
index 2b5bb50324f07cc14dec8493c84d474f1c885eb8..0000000000000000000000000000000000000000
--- a/third_party/mojo/src/mojo/public/cpp/system/buffer.h
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2014 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.
-
-// This file provides a C++ wrapping around the Mojo C API for shared buffers,
-// replacing the prefix of "Mojo" with a "mojo" namespace, and using more
-// strongly-typed representations of |MojoHandle|s.
-//
-// Please see "third_party/mojo/src/mojo/public/c/system/buffer.h" for complete documentation of the
-// API.
-
-#ifndef THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_SYSTEM_BUFFER_H_
-#define THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_SYSTEM_BUFFER_H_
-
-#include <assert.h>
-
-#include "third_party/mojo/src/mojo/public/c/system/buffer.h"
-#include "third_party/mojo/src/mojo/public/cpp/system/handle.h"
-#include "third_party/mojo/src/mojo/public/cpp/system/macros.h"
-
-namespace mojo {
-
-// A strongly-typed representation of a |MojoHandle| referring to a shared
-// buffer.
-class SharedBufferHandle : public Handle {
- public:
- SharedBufferHandle() {}
- explicit SharedBufferHandle(MojoHandle value) : Handle(value) {}
-
- // Copying and assignment allowed.
-};
-
-static_assert(sizeof(SharedBufferHandle) == sizeof(Handle),
- "Bad size for C++ SharedBufferHandle");
-
-typedef ScopedHandleBase<SharedBufferHandle> ScopedSharedBufferHandle;
-static_assert(sizeof(ScopedSharedBufferHandle) == sizeof(SharedBufferHandle),
- "Bad size for C++ ScopedSharedBufferHandle");
-
-// Creates a shared buffer. See |MojoCreateSharedBuffer()| for complete
-// documentation.
-inline MojoResult CreateSharedBuffer(
- const MojoCreateSharedBufferOptions* options,
- uint64_t num_bytes,
- ScopedSharedBufferHandle* shared_buffer) {
- assert(shared_buffer);
- SharedBufferHandle handle;
- MojoResult rv =
- MojoCreateSharedBuffer(options, num_bytes, handle.mutable_value());
- // Reset even on failure (reduces the chances that a "stale"/incorrect handle
- // will be used).
- shared_buffer->reset(handle);
- return rv;
-}
-
-// Duplicates a handle to a buffer, most commonly so that the buffer can be
-// shared with other applications. See |MojoDuplicateBufferHandle()| for
-// complete documentation.
-//
-// TODO(ggowan): Rename this to DuplicateBufferHandle since it is making another
-// handle to the same buffer, not duplicating the buffer itself.
-//
-// TODO(vtl): This (and also the functions below) are templatized to allow for
-// future/other buffer types. A bit "safer" would be to overload this function
-// manually. (The template enforces that the in and out handles be of the same
-// type.)
-template <class BufferHandleType>
-inline MojoResult DuplicateBuffer(
- BufferHandleType buffer,
- const MojoDuplicateBufferHandleOptions* options,
- ScopedHandleBase<BufferHandleType>* new_buffer) {
- assert(new_buffer);
- BufferHandleType handle;
- MojoResult rv = MojoDuplicateBufferHandle(
- buffer.value(), options, handle.mutable_value());
- // Reset even on failure (reduces the chances that a "stale"/incorrect handle
- // will be used).
- new_buffer->reset(handle);
- return rv;
-}
-
-// Maps a part of a buffer (specified by |buffer|, |offset|, and |num_bytes|)
-// into memory. See |MojoMapBuffer()| for complete documentation.
-template <class BufferHandleType>
-inline MojoResult MapBuffer(BufferHandleType buffer,
- uint64_t offset,
- uint64_t num_bytes,
- void** pointer,
- MojoMapBufferFlags flags) {
- assert(buffer.is_valid());
- return MojoMapBuffer(buffer.value(), offset, num_bytes, pointer, flags);
-}
-
-// Unmaps a part of a buffer that was previously mapped with |MapBuffer()|.
-// See |MojoUnmapBuffer()| for complete documentation.
-inline MojoResult UnmapBuffer(void* pointer) {
- assert(pointer);
- return MojoUnmapBuffer(pointer);
-}
-
-// A wrapper class that automatically creates a shared buffer and owns the
-// handle.
-class SharedBuffer {
- public:
- explicit SharedBuffer(uint64_t num_bytes);
- SharedBuffer(uint64_t num_bytes,
- const MojoCreateSharedBufferOptions& options);
- ~SharedBuffer();
-
- ScopedSharedBufferHandle handle;
-};
-
-inline SharedBuffer::SharedBuffer(uint64_t num_bytes) {
- MojoResult result = CreateSharedBuffer(nullptr, num_bytes, &handle);
- MOJO_ALLOW_UNUSED_LOCAL(result);
- assert(result == MOJO_RESULT_OK);
-}
-
-inline SharedBuffer::SharedBuffer(
- uint64_t num_bytes,
- const MojoCreateSharedBufferOptions& options) {
- MojoResult result = CreateSharedBuffer(&options, num_bytes, &handle);
- MOJO_ALLOW_UNUSED_LOCAL(result);
- assert(result == MOJO_RESULT_OK);
-}
-
-inline SharedBuffer::~SharedBuffer() {
-}
-
-} // namespace mojo
-
-#endif // THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_SYSTEM_BUFFER_H_
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