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| 1 // Copyright 2013 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_SYSTEM_CORE_H_ | |
| 6 #define MOJO_SYSTEM_CORE_H_ | |
| 7 | |
| 8 #include <stdint.h> | |
| 9 | |
| 10 #include "base/macros.h" | |
| 11 #include "base/memory/ref_counted.h" | |
| 12 #include "base/memory/scoped_ptr.h" | |
| 13 #include "base/synchronization/lock.h" | |
| 14 #include "mojo/public/c/system/buffer.h" | |
| 15 #include "mojo/public/c/system/data_pipe.h" | |
| 16 #include "mojo/public/c/system/message_pipe.h" | |
| 17 #include "mojo/public/c/system/types.h" | |
| 18 #include "mojo/system/handle_table.h" | |
| 19 #include "mojo/system/mapping_table.h" | |
| 20 #include "mojo/system/memory.h" | |
| 21 #include "mojo/system/system_impl_export.h" | |
| 22 | |
| 23 namespace mojo { | |
| 24 | |
| 25 namespace embedder { | |
| 26 class PlatformSupport; | |
| 27 } | |
| 28 | |
| 29 namespace system { | |
| 30 | |
| 31 class Dispatcher; | |
| 32 struct HandleSignalsState; | |
| 33 | |
| 34 // |Core| is an object that implements the Mojo system calls. All public methods | |
| 35 // are thread-safe. | |
| 36 class MOJO_SYSTEM_IMPL_EXPORT Core { | |
| 37 public: | |
| 38 // --------------------------------------------------------------------------- | |
| 39 | |
| 40 // These methods are only to be used by via the embedder API (and internally): | |
| 41 explicit Core(scoped_ptr<embedder::PlatformSupport> platform_support); | |
| 42 virtual ~Core(); | |
| 43 | |
| 44 // Adds |dispatcher| to the handle table, returning the handle for it. Returns | |
| 45 // |MOJO_HANDLE_INVALID| on failure, namely if the handle table is full. | |
| 46 MojoHandle AddDispatcher(const scoped_refptr<Dispatcher>& dispatcher); | |
| 47 | |
| 48 // Looks up the dispatcher for the given handle. Returns null if the handle is | |
| 49 // invalid. | |
| 50 scoped_refptr<Dispatcher> GetDispatcher(MojoHandle handle); | |
| 51 | |
| 52 embedder::PlatformSupport* platform_support() const { | |
| 53 return platform_support_.get(); | |
| 54 } | |
| 55 | |
| 56 // --------------------------------------------------------------------------- | |
| 57 | |
| 58 // System calls implementation: | |
| 59 MojoTimeTicks GetTimeTicksNow(); | |
| 60 MojoResult Close(MojoHandle handle); | |
| 61 MojoResult Wait(MojoHandle handle, | |
| 62 MojoHandleSignals signals, | |
| 63 MojoDeadline deadline, | |
| 64 UserPointer<MojoHandleSignalsState> signals_state); | |
| 65 MojoResult WaitMany(UserPointer<const MojoHandle> handles, | |
| 66 UserPointer<const MojoHandleSignals> signals, | |
| 67 uint32_t num_handles, | |
| 68 MojoDeadline deadline, | |
| 69 UserPointer<uint32_t> result_index, | |
| 70 UserPointer<MojoHandleSignalsState> signals_states); | |
| 71 MojoResult CreateMessagePipe( | |
| 72 UserPointer<const MojoCreateMessagePipeOptions> options, | |
| 73 UserPointer<MojoHandle> message_pipe_handle0, | |
| 74 UserPointer<MojoHandle> message_pipe_handle1); | |
| 75 MojoResult WriteMessage(MojoHandle message_pipe_handle, | |
| 76 UserPointer<const void> bytes, | |
| 77 uint32_t num_bytes, | |
| 78 UserPointer<const MojoHandle> handles, | |
| 79 uint32_t num_handles, | |
| 80 MojoWriteMessageFlags flags); | |
| 81 MojoResult ReadMessage(MojoHandle message_pipe_handle, | |
| 82 UserPointer<void> bytes, | |
| 83 UserPointer<uint32_t> num_bytes, | |
| 84 UserPointer<MojoHandle> handles, | |
| 85 UserPointer<uint32_t> num_handles, | |
| 86 MojoReadMessageFlags flags); | |
| 87 MojoResult CreateDataPipe( | |
| 88 UserPointer<const MojoCreateDataPipeOptions> options, | |
| 89 UserPointer<MojoHandle> data_pipe_producer_handle, | |
| 90 UserPointer<MojoHandle> data_pipe_consumer_handle); | |
| 91 MojoResult WriteData(MojoHandle data_pipe_producer_handle, | |
| 92 UserPointer<const void> elements, | |
| 93 UserPointer<uint32_t> num_bytes, | |
| 94 MojoWriteDataFlags flags); | |
| 95 MojoResult BeginWriteData(MojoHandle data_pipe_producer_handle, | |
| 96 UserPointer<void*> buffer, | |
| 97 UserPointer<uint32_t> buffer_num_bytes, | |
| 98 MojoWriteDataFlags flags); | |
| 99 MojoResult EndWriteData(MojoHandle data_pipe_producer_handle, | |
| 100 uint32_t num_bytes_written); | |
| 101 MojoResult ReadData(MojoHandle data_pipe_consumer_handle, | |
| 102 UserPointer<void> elements, | |
| 103 UserPointer<uint32_t> num_bytes, | |
| 104 MojoReadDataFlags flags); | |
| 105 MojoResult BeginReadData(MojoHandle data_pipe_consumer_handle, | |
| 106 UserPointer<const void*> buffer, | |
| 107 UserPointer<uint32_t> buffer_num_bytes, | |
| 108 MojoReadDataFlags flags); | |
| 109 MojoResult EndReadData(MojoHandle data_pipe_consumer_handle, | |
| 110 uint32_t num_bytes_read); | |
| 111 MojoResult CreateSharedBuffer( | |
| 112 UserPointer<const MojoCreateSharedBufferOptions> options, | |
| 113 uint64_t num_bytes, | |
| 114 UserPointer<MojoHandle> shared_buffer_handle); | |
| 115 MojoResult DuplicateBufferHandle( | |
| 116 MojoHandle buffer_handle, | |
| 117 UserPointer<const MojoDuplicateBufferHandleOptions> options, | |
| 118 UserPointer<MojoHandle> new_buffer_handle); | |
| 119 MojoResult MapBuffer(MojoHandle buffer_handle, | |
| 120 uint64_t offset, | |
| 121 uint64_t num_bytes, | |
| 122 UserPointer<void*> buffer, | |
| 123 MojoMapBufferFlags flags); | |
| 124 MojoResult UnmapBuffer(UserPointer<void> buffer); | |
| 125 | |
| 126 private: | |
| 127 friend bool internal::ShutdownCheckNoLeaks(Core*); | |
| 128 | |
| 129 // Internal implementation of |Wait()| and |WaitMany()|; doesn't do basic | |
| 130 // validation of arguments. |*result_index| is only set if the result (whether | |
| 131 // success or failure) applies to a specific handle, so its value should be | |
| 132 // preinitialized to |static_cast<uint32_t>(-1)|. | |
| 133 MojoResult WaitManyInternal(const MojoHandle* handles, | |
| 134 const MojoHandleSignals* signals, | |
| 135 uint32_t num_handles, | |
| 136 MojoDeadline deadline, | |
| 137 uint32_t* result_index, | |
| 138 HandleSignalsState* signals_states); | |
| 139 | |
| 140 const scoped_ptr<embedder::PlatformSupport> platform_support_; | |
| 141 | |
| 142 // TODO(vtl): |handle_table_lock_| should be a reader-writer lock (if only we | |
| 143 // had them). | |
| 144 base::Lock handle_table_lock_; // Protects |handle_table_|. | |
| 145 HandleTable handle_table_; | |
| 146 | |
| 147 base::Lock mapping_table_lock_; // Protects |mapping_table_|. | |
| 148 MappingTable mapping_table_; | |
| 149 | |
| 150 DISALLOW_COPY_AND_ASSIGN(Core); | |
| 151 }; | |
| 152 | |
| 153 } // namespace system | |
| 154 } // namespace mojo | |
| 155 | |
| 156 #endif // MOJO_SYSTEM_CORE_H_ | |
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Chromium Code Reviews
Issue 621153003:
Move mojo edk into mojo/edk (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master