Revert of Mojo: Eliminate duplicate C API symbols

mojo/public/c/system/thunks.cc

Index: mojo/public/c/system/thunks.cc
diff --git a/mojo/public/c/system/thunks.cc b/mojo/public/c/system/thunks.cc
deleted file mode 100644
index fe2793b7c5a1a75ac58298563e606233e4e2377d..0000000000000000000000000000000000000000
--- a/mojo/public/c/system/thunks.cc
+++ /dev/null
@@ -1,284 +0,0 @@
-// Copyright 2013 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 "mojo/public/c/system/thunks.h"
-
-#include <assert.h>
-#include <stddef.h>
-#include <stdint.h>
-
-extern "C" {
-
-static MojoSystemThunks g_thunks = {0};
-
-MojoTimeTicks MojoGetTimeTicksNow() {
-  assert(g_thunks.GetTimeTicksNow);
-  return g_thunks.GetTimeTicksNow();
-}
-
-MojoResult MojoClose(MojoHandle handle) {
-  assert(g_thunks.Close);
-  return g_thunks.Close(handle);
-}
-
-MojoResult MojoWait(MojoHandle handle,
-                    MojoHandleSignals signals,
-                    MojoDeadline deadline,
-                    struct MojoHandleSignalsState* signals_state) {
-  assert(g_thunks.Wait);
-  return g_thunks.Wait(handle, signals, deadline, signals_state);
-}
-
-MojoResult MojoWaitMany(const MojoHandle* handles,
-                        const MojoHandleSignals* signals,
-                        uint32_t num_handles,
-                        MojoDeadline deadline,
-                        uint32_t* result_index,
-                        struct MojoHandleSignalsState* signals_states) {
-  assert(g_thunks.WaitMany);
-  return g_thunks.WaitMany(handles, signals, num_handles, deadline,
-                           result_index, signals_states);
-}
-
-MojoResult MojoCreateMessagePipe(const MojoCreateMessagePipeOptions* options,
-                                 MojoHandle* message_pipe_handle0,
-                                 MojoHandle* message_pipe_handle1) {
-  assert(g_thunks.CreateMessagePipe);
-  return g_thunks.CreateMessagePipe(options, message_pipe_handle0,
-                                    message_pipe_handle1);
-}
-
-MojoResult MojoWriteMessage(MojoHandle message_pipe_handle,
-                            const void* bytes,
-                            uint32_t num_bytes,
-                            const MojoHandle* handles,
-                            uint32_t num_handles,
-                            MojoWriteMessageFlags flags) {
-  assert(g_thunks.WriteMessage);
-  return g_thunks.WriteMessage(message_pipe_handle, bytes, num_bytes, handles,
-                               num_handles, flags);
-}
-
-MojoResult MojoReadMessage(MojoHandle message_pipe_handle,
-                           void* bytes,
-                           uint32_t* num_bytes,
-                           MojoHandle* handles,
-                           uint32_t* num_handles,
-                           MojoReadMessageFlags flags) {
-  assert(g_thunks.ReadMessage);
-  return g_thunks.ReadMessage(message_pipe_handle, bytes, num_bytes, handles,
-                              num_handles, flags);
-}
-
-MojoResult MojoCreateDataPipe(const MojoCreateDataPipeOptions* options,
-                              MojoHandle* data_pipe_producer_handle,
-                              MojoHandle* data_pipe_consumer_handle) {
-  assert(g_thunks.CreateDataPipe);
-  return g_thunks.CreateDataPipe(options, data_pipe_producer_handle,
-                                 data_pipe_consumer_handle);
-}
-
-MojoResult MojoWriteData(MojoHandle data_pipe_producer_handle,
-                         const void* elements,
-                         uint32_t* num_elements,
-                         MojoWriteDataFlags flags) {
-  assert(g_thunks.WriteData);
-  return g_thunks.WriteData(data_pipe_producer_handle, elements, num_elements,
-                            flags);
-}
-
-MojoResult MojoBeginWriteData(MojoHandle data_pipe_producer_handle,
-                              void** buffer,
-                              uint32_t* buffer_num_elements,
-                              MojoWriteDataFlags flags) {
-  assert(g_thunks.BeginWriteData);
-  return g_thunks.BeginWriteData(data_pipe_producer_handle, buffer,
-                                 buffer_num_elements, flags);
-}
-
-MojoResult MojoEndWriteData(MojoHandle data_pipe_producer_handle,
-                            uint32_t num_elements_written) {
-  assert(g_thunks.EndWriteData);
-  return g_thunks.EndWriteData(data_pipe_producer_handle, num_elements_written);
-}
-
-MojoResult MojoReadData(MojoHandle data_pipe_consumer_handle,
-                        void* elements,
-                        uint32_t* num_elements,
-                        MojoReadDataFlags flags) {
-  assert(g_thunks.ReadData);
-  return g_thunks.ReadData(data_pipe_consumer_handle, elements, num_elements,
-                           flags);
-}
-
-MojoResult MojoBeginReadData(MojoHandle data_pipe_consumer_handle,
-                             const void** buffer,
-                             uint32_t* buffer_num_elements,
-                             MojoReadDataFlags flags) {
-  assert(g_thunks.BeginReadData);
-  return g_thunks.BeginReadData(data_pipe_consumer_handle, buffer,
-                                buffer_num_elements, flags);
-}
-
-MojoResult MojoEndReadData(MojoHandle data_pipe_consumer_handle,
-                           uint32_t num_elements_read) {
-  assert(g_thunks.EndReadData);
-  return g_thunks.EndReadData(data_pipe_consumer_handle, num_elements_read);
-}
-
-MojoResult MojoCreateSharedBuffer(
-    const struct MojoCreateSharedBufferOptions* options,
-    uint64_t num_bytes,
-    MojoHandle* shared_buffer_handle) {
-  assert(g_thunks.CreateSharedBuffer);
-  return g_thunks.CreateSharedBuffer(options, num_bytes, shared_buffer_handle);
-}
-
-MojoResult MojoDuplicateBufferHandle(
-    MojoHandle buffer_handle,
-    const struct MojoDuplicateBufferHandleOptions* options,
-    MojoHandle* new_buffer_handle) {
-  assert(g_thunks.DuplicateBufferHandle);
-  return g_thunks.DuplicateBufferHandle(buffer_handle, options,
-                                        new_buffer_handle);
-}
-
-MojoResult MojoMapBuffer(MojoHandle buffer_handle,
-                         uint64_t offset,
-                         uint64_t num_bytes,
-                         void** buffer,
-                         MojoMapBufferFlags flags) {
-  assert(g_thunks.MapBuffer);
-  return g_thunks.MapBuffer(buffer_handle, offset, num_bytes, buffer, flags);
-}
-
-MojoResult MojoUnmapBuffer(void* buffer) {
-  assert(g_thunks.UnmapBuffer);
-  return g_thunks.UnmapBuffer(buffer);
-}
-
-MojoResult MojoCreateWaitSet(MojoHandle* wait_set) {
-  assert(g_thunks.CreateWaitSet);
-  return g_thunks.CreateWaitSet(wait_set);
-}
-
-MojoResult MojoAddHandle(MojoHandle wait_set,
-                         MojoHandle handle,
-                         MojoHandleSignals signals) {
-  assert(g_thunks.AddHandle);
-  return g_thunks.AddHandle(wait_set, handle, signals);
-}
-
-MojoResult MojoRemoveHandle(MojoHandle wait_set, MojoHandle handle) {
-  assert(g_thunks.RemoveHandle);
-  return g_thunks.RemoveHandle(wait_set, handle);
-}
-
-MojoResult MojoGetReadyHandles(MojoHandle wait_set,
-                               uint32_t* count,
-                               MojoHandle* handles,
-                               MojoResult* results,
-                               struct MojoHandleSignalsState* signals_states) {
-  assert(g_thunks.GetReadyHandles);
-  return g_thunks.GetReadyHandles(wait_set, count, handles, results,
-                                  signals_states);
-}
-
-MojoResult MojoWatch(MojoHandle handle,
-                     MojoHandleSignals signals,
-                     MojoWatchCallback callback,
-                     uintptr_t context) {
-  assert(g_thunks.Watch);
-  return g_thunks.Watch(handle, signals, callback, context);
-}
-
-MojoResult MojoCancelWatch(MojoHandle handle, uintptr_t context) {
-  assert(g_thunks.CancelWatch);
-  return g_thunks.CancelWatch(handle, context);
-}
-
-MojoResult MojoFuseMessagePipes(MojoHandle handle0, MojoHandle handle1) {
-  assert(g_thunks.FuseMessagePipes);
-  return g_thunks.FuseMessagePipes(handle0, handle1);
-}
-
-MojoResult MojoWriteMessageNew(MojoHandle message_pipe_handle,
-                               MojoMessageHandle message,
-                               MojoWriteMessageFlags flags) {
-  assert(g_thunks.WriteMessageNew);
-  return g_thunks.WriteMessageNew(message_pipe_handle, message, flags);
-}
-
-MojoResult MojoReadMessageNew(MojoHandle message_pipe_handle,
-                              MojoMessageHandle* message,
-                              uint32_t* num_bytes,
-                              MojoHandle* handles,
-                              uint32_t* num_handles,
-                              MojoReadMessageFlags flags) {
-  assert(g_thunks.ReadMessageNew);
-  return g_thunks.ReadMessageNew(message_pipe_handle, message, num_bytes,
-                                 handles, num_handles, flags);
-}
-
-MojoResult MojoAllocMessage(uint32_t num_bytes,
-                            const MojoHandle* handles,
-                            uint32_t num_handles,
-                            MojoAllocMessageFlags flags,
-                            MojoMessageHandle* message) {
-  assert(g_thunks.AllocMessage);
-  return g_thunks.AllocMessage(
-      num_bytes, handles, num_handles, flags, message);
-}
-
-MojoResult MojoFreeMessage(MojoMessageHandle message) {
-  assert(g_thunks.FreeMessage);
-  return g_thunks.FreeMessage(message);
-}
-
-MojoResult MojoGetMessageBuffer(MojoMessageHandle message, void** buffer) {
-  assert(g_thunks.GetMessageBuffer);
-  return g_thunks.GetMessageBuffer(message, buffer);
-}
-
-MojoResult MojoWrapPlatformHandle(
-    const struct MojoPlatformHandle* platform_handle,
-    MojoHandle* mojo_handle) {
-  assert(g_thunks.WrapPlatformHandle);
-  return g_thunks.WrapPlatformHandle(platform_handle, mojo_handle);
-}
-
-MojoResult MojoUnwrapPlatformHandle(
-    MojoHandle mojo_handle,
-    struct MojoPlatformHandle* platform_handle) {
-  assert(g_thunks.UnwrapPlatformHandle);
-  return g_thunks.UnwrapPlatformHandle(mojo_handle, platform_handle);
-}
-
-MojoResult MojoWrapPlatformSharedBufferHandle(
-    const struct MojoPlatformHandle* platform_handle,
-    size_t num_bytes,
-    MojoPlatformSharedBufferHandleFlags flags,
-    MojoHandle* mojo_handle) {
-  assert(g_thunks.WrapPlatformSharedBufferHandle);
-  return g_thunks.WrapPlatformSharedBufferHandle(platform_handle, num_bytes,
-                                                 flags, mojo_handle);
-}
-
-MojoResult MojoUnwrapPlatformSharedBufferHandle(
-    MojoHandle mojo_handle,
-    struct MojoPlatformHandle* platform_handle,
-    size_t* num_bytes,
-    MojoPlatformSharedBufferHandleFlags* flags) {
-  assert(g_thunks.UnwrapPlatformSharedBufferHandle);
-  return g_thunks.UnwrapPlatformSharedBufferHandle(mojo_handle, platform_handle,
-                                                   num_bytes, flags);
-}
-
-}  // extern "C"
-
-size_t MojoEmbedderSetSystemThunks(const MojoSystemThunks* system_thunks) {
-  if (system_thunks->size >= sizeof(g_thunks))
-    g_thunks = *system_thunks;
-  return sizeof(g_thunks);
-}