Convert ppapi/shared to use TrackedCallback.

ppapi/shared_impl/private/udp_socket_private_impl.cc

 // Copyright (c) 2011 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/shared_impl/private/udp_socket_private_impl.h"
 
 #include <string.h>
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 
 namespace ppapi {
 
-namespace {
-
-void AbortCallback(PP_CompletionCallback callback) {
-  PP_RunCompletionCallback(&callback, PP_ERROR_ABORTED);
-}
-
-}  // namespace
-
 const int32_t UDPSocketPrivateImpl::kMaxReadSize = 1024 * 1024;
 const int32_t UDPSocketPrivateImpl::kMaxWriteSize = 1024 * 1024;
 
 UDPSocketPrivateImpl::UDPSocketPrivateImpl(const HostResource& resource,
                                            uint32 socket_id)
     : Resource(resource) {
   Init(socket_id);
 }
 
 UDPSocketPrivateImpl::UDPSocketPrivateImpl(PP_Instance instance,
                                            uint32 socket_id)
     : Resource(instance) {
   Init(socket_id);
 }
 
 UDPSocketPrivateImpl::~UDPSocketPrivateImpl() {
 }
 
 thunk::PPB_UDPSocket_Private_API*
 UDPSocketPrivateImpl::AsPPB_UDPSocket_Private_API() {
   return this;
 }
 
 int32_t UDPSocketPrivateImpl::Bind(const PP_NetAddress_Private* addr,
                                    PP_CompletionCallback callback) {
   if (!addr || !callback.func)
     return PP_ERROR_BADARGUMENT;
   if (bound_ || closed_)
     return PP_ERROR_FAILED;
-  if (bind_callback_.func)
+  if (TrackedCallback::IsPending(bind_callback_))
     return PP_ERROR_INPROGRESS;
   // TODO(dmichael): use some other strategy for determining if an
   // operation is in progress
 
-  bind_callback_ = callback;
+  bind_callback_ = new TrackedCallback(this, callback);
 
   // Send the request, the browser will call us back via BindACK.
   SendBind(*addr);
   return PP_OK_COMPLETIONPENDING;
 }
 
 int32_t UDPSocketPrivateImpl::RecvFrom(char* buffer,
                                        int32_t num_bytes,
                                        PP_CompletionCallback callback) {
   if (!buffer || num_bytes <= 0 || !callback.func)
     return PP_ERROR_BADARGUMENT;
   if (!bound_)
     return PP_ERROR_FAILED;
-  if (recvfrom_callback_.func)
+  if (TrackedCallback::IsPending(recvfrom_callback_))
     return PP_ERROR_INPROGRESS;
 
   read_buffer_ = buffer;
   bytes_to_read_ = std::min(num_bytes, kMaxReadSize);
-  recvfrom_callback_ = callback;
+  recvfrom_callback_ = new TrackedCallback(this, callback);
 
   // Send the request, the browser will call us back via RecvFromACK.
   SendRecvFrom(bytes_to_read_);
   return PP_OK_COMPLETIONPENDING;
 }
 
 PP_Bool UDPSocketPrivateImpl::GetRecvFromAddress(PP_NetAddress_Private* addr) {
   if (!addr)
     return PP_FALSE;
 
   *addr = recvfrom_addr_;
   return PP_TRUE;
 }
 
 int32_t UDPSocketPrivateImpl::SendTo(const char* buffer,
                                      int32_t num_bytes,
                                      const PP_NetAddress_Private* addr,
                                      PP_CompletionCallback callback) {
   if (!buffer || num_bytes <= 0 || !addr || !callback.func)
     return PP_ERROR_BADARGUMENT;
   if (!bound_)
     return PP_ERROR_FAILED;
-  if (sendto_callback_.func)
+  if (TrackedCallback::IsPending(sendto_callback_))
     return PP_ERROR_INPROGRESS;
 
   if (num_bytes > kMaxWriteSize)
     num_bytes = kMaxWriteSize;
 
-  sendto_callback_ = callback;
+  sendto_callback_ = new TrackedCallback(this, callback);
 
   // Send the request, the browser will call us back via SendToACK.
   SendSendTo(std::string(buffer, num_bytes), *addr);
   return PP_OK_COMPLETIONPENDING;
 }
 
 void UDPSocketPrivateImpl::Close() {
   if(closed_)
     return;
 
   bound_ = false;
   closed_ = true;
 
   SendClose();
 
   socket_id_ = 0;
 
-  PostAbortAndClearIfNecessary(&bind_callback_);
-  PostAbortAndClearIfNecessary(&recvfrom_callback_);
-  PostAbortAndClearIfNecessary(&sendto_callback_);
+  PostAbortIfNecessary(&bind_callback_);
+  PostAbortIfNecessary(&recvfrom_callback_);
+  PostAbortIfNecessary(&sendto_callback_);
 }
 
 void UDPSocketPrivateImpl::OnBindCompleted(bool succeeded) {
-  if (!bind_callback_.func) {
+  if (!TrackedCallback::IsPending(bind_callback_)) {
     NOTREACHED();
     return;
   }
 
   if (succeeded)
     bound_ = true;
 
-  PP_RunAndClearCompletionCallback(&bind_callback_,
-                                   succeeded ? PP_OK : PP_ERROR_FAILED);
+  TrackedCallback::ClearAndRun(&bind_callback_,
+                               succeeded ? PP_OK : PP_ERROR_FAILED);
 }
 
 void UDPSocketPrivateImpl::OnRecvFromCompleted(
     bool succeeded,
     const std::string& data,
     const PP_NetAddress_Private& addr) {
-  if (!recvfrom_callback_.func || !read_buffer_) {
+  if (!TrackedCallback::IsPending(recvfrom_callback_) || !read_buffer_) {
     NOTREACHED();
     return;
   }
 
   if (succeeded) {
     CHECK_LE(static_cast<int32_t>(data.size()), bytes_to_read_);
     if (!data.empty())
       memcpy(read_buffer_, data.c_str(), data.size());
   }
   read_buffer_ = NULL;
   bytes_to_read_ = -1;
   recvfrom_addr_ = addr;
 
-  PP_RunAndClearCompletionCallback(
-      &recvfrom_callback_,
+  TrackedCallback::ClearAndRun(&recvfrom_callback_,
       succeeded ? static_cast<int32_t>(data.size()) :
       static_cast<int32_t>(PP_ERROR_FAILED));
 }
 
 void UDPSocketPrivateImpl::OnSendToCompleted(bool succeeded,
                                              int32_t bytes_written) {
-  if (!sendto_callback_.func) {
+  if (!TrackedCallback::IsPending(sendto_callback_)) {
     NOTREACHED();
     return;
   }
 
-  PP_RunAndClearCompletionCallback(
-      &sendto_callback_,
+  TrackedCallback::ClearAndRun(&sendto_callback_,
       succeeded ? bytes_written : static_cast<int32_t>(PP_ERROR_FAILED));
 }
 
 void UDPSocketPrivateImpl::Init(uint32 socket_id) {
   DCHECK(socket_id != 0);
   socket_id_ = socket_id;
   bound_ = false;
   closed_ = false;
-  bind_callback_ = PP_BlockUntilComplete();
-  recvfrom_callback_ = PP_BlockUntilComplete();
-  sendto_callback_ = PP_BlockUntilComplete();
   read_buffer_ = NULL;
   bytes_to_read_ = -1;
 
   recvfrom_addr_.size = 0;
   memset(recvfrom_addr_.data, 0,
          arraysize(recvfrom_addr_.data) * sizeof(*recvfrom_addr_.data));
 }
 
-void UDPSocketPrivateImpl::PostAbortAndClearIfNecessary(
-    PP_CompletionCallback* callback) {
-  DCHECK(callback);
-
-  if (callback->func) {
-    MessageLoop::current()->PostTask(FROM_HERE,
-                                     base::Bind(&AbortCallback, *callback));
-    *callback = PP_BlockUntilComplete();
-  }
+void UDPSocketPrivateImpl::PostAbortIfNecessary(

[viettrungluu, 2012/01/04 01:15:14]

"

+    scoped_refptr<TrackedCallback>* callback) {
+  if (callback->get())
+    (*callback)->PostAbort();
 }
 
 }  // namespace ppapi