| OLD | NEW |
| (Empty) |
| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef MOJO_PUBLIC_CPP_SYSTEM_MESSAGE_PIPE_H_ | |
| 6 #define MOJO_PUBLIC_CPP_SYSTEM_MESSAGE_PIPE_H_ | |
| 7 | |
| 8 #include <assert.h> | |
| 9 | |
| 10 #include "mojo/public/c/system/message_pipe.h" | |
| 11 #include "mojo/public/cpp/system/handle.h" | |
| 12 #include "mojo/public/cpp/system/macros.h" | |
| 13 | |
| 14 namespace mojo { | |
| 15 | |
| 16 // MessagePipeHandle ----------------------------------------------------------- | |
| 17 | |
| 18 class MessagePipeHandle : public Handle { | |
| 19 public: | |
| 20 MessagePipeHandle() {} | |
| 21 explicit MessagePipeHandle(MojoHandle value) : Handle(value) {} | |
| 22 | |
| 23 // Copying and assignment allowed. | |
| 24 }; | |
| 25 | |
| 26 static_assert(sizeof(MessagePipeHandle) == sizeof(Handle), | |
| 27 "Bad size for C++ MessagePipeHandle"); | |
| 28 | |
| 29 typedef ScopedHandleBase<MessagePipeHandle> ScopedMessagePipeHandle; | |
| 30 static_assert(sizeof(ScopedMessagePipeHandle) == sizeof(MessagePipeHandle), | |
| 31 "Bad size for C++ ScopedMessagePipeHandle"); | |
| 32 | |
| 33 inline MojoResult CreateMessagePipe(const MojoCreateMessagePipeOptions* options, | |
| 34 ScopedMessagePipeHandle* message_pipe0, | |
| 35 ScopedMessagePipeHandle* message_pipe1) { | |
| 36 assert(message_pipe0); | |
| 37 assert(message_pipe1); | |
| 38 MessagePipeHandle handle0; | |
| 39 MessagePipeHandle handle1; | |
| 40 MojoResult rv = MojoCreateMessagePipe( | |
| 41 options, handle0.mutable_value(), handle1.mutable_value()); | |
| 42 // Reset even on failure (reduces the chances that a "stale"/incorrect handle | |
| 43 // will be used). | |
| 44 message_pipe0->reset(handle0); | |
| 45 message_pipe1->reset(handle1); | |
| 46 return rv; | |
| 47 } | |
| 48 | |
| 49 // These "raw" versions fully expose the underlying API, but don't help with | |
| 50 // ownership of handles (especially when writing messages). | |
| 51 // TODO(vtl): Write "baked" versions. | |
| 52 inline MojoResult WriteMessageRaw(MessagePipeHandle message_pipe, | |
| 53 const void* bytes, | |
| 54 uint32_t num_bytes, | |
| 55 const MojoHandle* handles, | |
| 56 uint32_t num_handles, | |
| 57 MojoWriteMessageFlags flags) { | |
| 58 return MojoWriteMessage( | |
| 59 message_pipe.value(), bytes, num_bytes, handles, num_handles, flags); | |
| 60 } | |
| 61 | |
| 62 inline MojoResult ReadMessageRaw(MessagePipeHandle message_pipe, | |
| 63 void* bytes, | |
| 64 uint32_t* num_bytes, | |
| 65 MojoHandle* handles, | |
| 66 uint32_t* num_handles, | |
| 67 MojoReadMessageFlags flags) { | |
| 68 return MojoReadMessage( | |
| 69 message_pipe.value(), bytes, num_bytes, handles, num_handles, flags); | |
| 70 } | |
| 71 | |
| 72 // A wrapper class that automatically creates a message pipe and owns both | |
| 73 // handles. | |
| 74 class MessagePipe { | |
| 75 public: | |
| 76 MessagePipe(); | |
| 77 explicit MessagePipe(const MojoCreateMessagePipeOptions& options); | |
| 78 ~MessagePipe(); | |
| 79 | |
| 80 ScopedMessagePipeHandle handle0; | |
| 81 ScopedMessagePipeHandle handle1; | |
| 82 }; | |
| 83 | |
| 84 inline MessagePipe::MessagePipe() { | |
| 85 MojoResult result = CreateMessagePipe(nullptr, &handle0, &handle1); | |
| 86 MOJO_ALLOW_UNUSED_LOCAL(result); | |
| 87 assert(result == MOJO_RESULT_OK); | |
| 88 } | |
| 89 | |
| 90 inline MessagePipe::MessagePipe(const MojoCreateMessagePipeOptions& options) { | |
| 91 MojoResult result = CreateMessagePipe(&options, &handle0, &handle1); | |
| 92 MOJO_ALLOW_UNUSED_LOCAL(result); | |
| 93 assert(result == MOJO_RESULT_OK); | |
| 94 } | |
| 95 | |
| 96 inline MessagePipe::~MessagePipe() { | |
| 97 } | |
| 98 | |
| 99 } // namespace mojo | |
| 100 | |
| 101 #endif // MOJO_PUBLIC_CPP_SYSTEM_MESSAGE_PIPE_H_ | |
| OLD | NEW |