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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be | 
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. | 
| 4 | 4 | 
| 5 #include "ipc/ipc_message.h" | 5 #include "ipc/ipc_message.h" | 
| 6 | 6 | 
| 7 #include "base/atomic_sequence_num.h" | 7 #include "base/atomic_sequence_num.h" | 
| 8 #include "base/logging.h" | 8 #include "base/logging.h" | 
| 9 #include "build/build_config.h" | 9 #include "build/build_config.h" | 
| 10 #include "ipc/ipc_message_attachment.h" | 10 #include "ipc/ipc_message_attachment.h" | 
| 11 #include "ipc/ipc_message_attachment_set.h" | 11 #include "ipc/ipc_message_attachment_set.h" | 
| 12 | 12 | 
| 13 #if defined(OS_POSIX) | 13 #if defined(OS_POSIX) | 
| 14 #include "base/file_descriptor_posix.h" | 14 #include "base/file_descriptor_posix.h" | 
| 15 #include "ipc/ipc_platform_file_attachment_posix.h" | 15 #include "ipc/ipc_platform_file_attachment_posix.h" | 
| 16 #endif | 16 #endif | 
| 17 | 17 | 
| 18 namespace { | 18 namespace { | 
| 19 | 19 | 
| 20 base::StaticAtomicSequenceNumber g_ref_num; | 20 base::StaticAtomicSequenceNumber g_ref_num; | 
| 21 | 21 | 
| 22 // Create a reference number for identifying IPC messages in traces. The return | 22 // Create a reference number for identifying IPC messages in traces. The return | 
| 23 // values has the reference number stored in the upper 24 bits, leaving the low | 23 // values has the reference number stored in the upper 24 bits, leaving the low | 
| 24 // 8 bits set to 0 for use as flags. | 24 // 8 bits set to 0 for use as flags. | 
| 25 inline uint32 GetRefNumUpper24() { | 25 inline uint32_t GetRefNumUpper24() { | 
| 26   base::trace_event::TraceLog* trace_log = | 26   base::trace_event::TraceLog* trace_log = | 
| 27       base::trace_event::TraceLog::GetInstance(); | 27       base::trace_event::TraceLog::GetInstance(); | 
| 28   uint32 pid = trace_log ? trace_log->process_id() : 0; | 28   uint32_t pid = trace_log ? trace_log->process_id() : 0; | 
| 29   uint32 count = g_ref_num.GetNext(); | 29   uint32_t count = g_ref_num.GetNext(); | 
| 30   // The 24 bit hash is composed of 14 bits of the count and 10 bits of the | 30   // The 24 bit hash is composed of 14 bits of the count and 10 bits of the | 
| 31   // Process ID. With the current trace event buffer cap, the 14-bit count did | 31   // Process ID. With the current trace event buffer cap, the 14-bit count did | 
| 32   // not appear to wrap during a trace. Note that it is not a big deal if | 32   // not appear to wrap during a trace. Note that it is not a big deal if | 
| 33   // collisions occur, as this is only used for debugging and trace analysis. | 33   // collisions occur, as this is only used for debugging and trace analysis. | 
| 34   return ((pid << 14) | (count & 0x3fff)) << 8; | 34   return ((pid << 14) | (count & 0x3fff)) << 8; | 
| 35 } | 35 } | 
| 36 | 36 | 
| 37 }  // namespace | 37 }  // namespace | 
| 38 | 38 | 
| 39 namespace IPC { | 39 namespace IPC { | 
| 40 | 40 | 
| 41 //------------------------------------------------------------------------------ | 41 //------------------------------------------------------------------------------ | 
| 42 | 42 | 
| 43 Message::~Message() { | 43 Message::~Message() { | 
| 44 } | 44 } | 
| 45 | 45 | 
| 46 Message::Message() : base::Pickle(sizeof(Header)) { | 46 Message::Message() : base::Pickle(sizeof(Header)) { | 
| 47   header()->routing = header()->type = 0; | 47   header()->routing = header()->type = 0; | 
| 48   header()->flags = GetRefNumUpper24(); | 48   header()->flags = GetRefNumUpper24(); | 
| 49 #if defined(OS_POSIX) | 49 #if defined(OS_POSIX) | 
| 50   header()->num_fds = 0; | 50   header()->num_fds = 0; | 
| 51   header()->pad = 0; | 51   header()->pad = 0; | 
| 52 #endif | 52 #endif | 
| 53   Init(); | 53   Init(); | 
| 54 } | 54 } | 
| 55 | 55 | 
| 56 Message::Message(int32 routing_id, uint32 type, PriorityValue priority) | 56 Message::Message(int32_t routing_id, uint32_t type, PriorityValue priority) | 
| 57     : base::Pickle(sizeof(Header)) { | 57     : base::Pickle(sizeof(Header)) { | 
| 58   header()->routing = routing_id; | 58   header()->routing = routing_id; | 
| 59   header()->type = type; | 59   header()->type = type; | 
| 60   DCHECK((priority & 0xffffff00) == 0); | 60   DCHECK((priority & 0xffffff00) == 0); | 
| 61   header()->flags = priority | GetRefNumUpper24(); | 61   header()->flags = priority | GetRefNumUpper24(); | 
| 62 #if defined(OS_POSIX) | 62 #if defined(OS_POSIX) | 
| 63   header()->num_fds = 0; | 63   header()->num_fds = 0; | 
| 64   header()->pad = 0; | 64   header()->pad = 0; | 
| 65 #endif | 65 #endif | 
| 66   Init(); | 66   Init(); | 
| (...skipping 18 matching lines...) Expand all  Loading... | 
| 85   log_data_ = NULL; | 85   log_data_ = NULL; | 
| 86 #endif | 86 #endif | 
| 87 } | 87 } | 
| 88 | 88 | 
| 89 Message& Message::operator=(const Message& other) { | 89 Message& Message::operator=(const Message& other) { | 
| 90   *static_cast<base::Pickle*>(this) = other; | 90   *static_cast<base::Pickle*>(this) = other; | 
| 91   attachment_set_ = other.attachment_set_; | 91   attachment_set_ = other.attachment_set_; | 
| 92   return *this; | 92   return *this; | 
| 93 } | 93 } | 
| 94 | 94 | 
| 95 void Message::SetHeaderValues(int32 routing, uint32 type, uint32 flags) { | 95 void Message::SetHeaderValues(int32_t routing, uint32_t type, uint32_t flags) { | 
| 96   // This should only be called when the message is already empty. | 96   // This should only be called when the message is already empty. | 
| 97   DCHECK(payload_size() == 0); | 97   DCHECK(payload_size() == 0); | 
| 98 | 98 | 
| 99   header()->routing = routing; | 99   header()->routing = routing; | 
| 100   header()->type = type; | 100   header()->type = type; | 
| 101   header()->flags = flags; | 101   header()->flags = flags; | 
| 102 } | 102 } | 
| 103 | 103 | 
| 104 void Message::EnsureMessageAttachmentSet() { | 104 void Message::EnsureMessageAttachmentSet() { | 
| 105   if (attachment_set_.get() == NULL) | 105   if (attachment_set_.get() == NULL) | 
| 106     attachment_set_ = new MessageAttachmentSet; | 106     attachment_set_ = new MessageAttachmentSet; | 
| 107 } | 107 } | 
| 108 | 108 | 
| 109 #ifdef IPC_MESSAGE_LOG_ENABLED | 109 #ifdef IPC_MESSAGE_LOG_ENABLED | 
| 110 void Message::set_sent_time(int64 time) { | 110 void Message::set_sent_time(int64_t time) { | 
| 111   DCHECK((header()->flags & HAS_SENT_TIME_BIT) == 0); | 111   DCHECK((header()->flags & HAS_SENT_TIME_BIT) == 0); | 
| 112   header()->flags |= HAS_SENT_TIME_BIT; | 112   header()->flags |= HAS_SENT_TIME_BIT; | 
| 113   WriteInt64(time); | 113   WriteInt64(time); | 
| 114 } | 114 } | 
| 115 | 115 | 
| 116 int64 Message::sent_time() const { | 116 int64_t Message::sent_time() const { | 
| 117   if ((header()->flags & HAS_SENT_TIME_BIT) == 0) | 117   if ((header()->flags & HAS_SENT_TIME_BIT) == 0) | 
| 118     return 0; | 118     return 0; | 
| 119 | 119 | 
| 120   const char* data = end_of_payload(); | 120   const char* data = end_of_payload(); | 
| 121   data -= sizeof(int64); | 121   data -= sizeof(int64_t); | 
| 122   return *(reinterpret_cast<const int64*>(data)); | 122   return *(reinterpret_cast<const int64_t*>(data)); | 
| 123 } | 123 } | 
| 124 | 124 | 
| 125 void Message::set_received_time(int64 time) const { | 125 void Message::set_received_time(int64_t time) const { | 
| 126   received_time_ = time; | 126   received_time_ = time; | 
| 127 } | 127 } | 
| 128 #endif | 128 #endif | 
| 129 | 129 | 
| 130 bool Message::WriteAttachment(scoped_refptr<MessageAttachment> attachment) { | 130 bool Message::WriteAttachment(scoped_refptr<MessageAttachment> attachment) { | 
| 131   // We write the index of the descriptor so that we don't have to | 131   // We write the index of the descriptor so that we don't have to | 
| 132   // keep the current descriptor as extra decoding state when deserialising. | 132   // keep the current descriptor as extra decoding state when deserialising. | 
| 133   WriteInt(attachment_set()->size()); | 133   WriteInt(attachment_set()->size()); | 
| 134   return attachment_set()->AddAttachment(attachment); | 134   return attachment_set()->AddAttachment(attachment); | 
| 135 } | 135 } | 
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| 156 bool Message::HasMojoHandles() const { | 156 bool Message::HasMojoHandles() const { | 
| 157   return attachment_set_.get() && attachment_set_->num_mojo_handles() > 0; | 157   return attachment_set_.get() && attachment_set_->num_mojo_handles() > 0; | 
| 158 } | 158 } | 
| 159 | 159 | 
| 160 bool Message::HasBrokerableAttachments() const { | 160 bool Message::HasBrokerableAttachments() const { | 
| 161   return attachment_set_.get() && | 161   return attachment_set_.get() && | 
| 162          attachment_set_->num_brokerable_attachments() > 0; | 162          attachment_set_->num_brokerable_attachments() > 0; | 
| 163 } | 163 } | 
| 164 | 164 | 
| 165 }  // namespace IPC | 165 }  // namespace IPC | 
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