Create a QUIC wrapper around a mutex and a mutex lock.

net/tools/quic/test_tools/packet_dropping_test_writer.h

 // 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.
 
 #ifndef NET_TOOLS_QUIC_TEST_TOOLS_PACKET_DROPPING_TEST_WRITER_H_
 #define NET_TOOLS_QUIC_TEST_TOOLS_PACKET_DROPPING_TEST_WRITER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 53 matching lines @@
   // for the next delayed packet to be written.
   QuicTime ReleaseOldPackets();
 
   // Sets |delay_alarm_| to fire at |new_deadline|.
   void SetDelayAlarm(QuicTime new_deadline);
 
   void OnCanWrite();
 
   // The percent of time a packet is simulated as being lost.
   void set_fake_packet_loss_percentage(int32_t fake_packet_loss_percentage) {
-    base::AutoLock locked(config_mutex_);
+    QuicWriterMutexLock lock(&config_mutex_);
     fake_packet_loss_percentage_ = fake_packet_loss_percentage;
   }
 
   // Simulate dropping the first n packets unconditionally.
   // Subsequent packets will be lost at fake_packet_loss_percentage_ if set.
   void set_fake_drop_first_n_packets(int32_t fake_drop_first_n_packets) {
-    base::AutoLock locked(config_mutex_);
+    QuicWriterMutexLock lock(&config_mutex_);
     fake_drop_first_n_packets_ = fake_drop_first_n_packets;
   }
 
   // The percent of time WritePacket will block and set WriteResult's status
   // to WRITE_STATUS_BLOCKED.
   void set_fake_blocked_socket_percentage(
       int32_t fake_blocked_socket_percentage) {
     DCHECK(clock_);
-    base::AutoLock locked(config_mutex_);
+    QuicWriterMutexLock lock(&config_mutex_);
     fake_blocked_socket_percentage_ = fake_blocked_socket_percentage;
   }
 
   // The percent of time a packet is simulated as being reordered.
   void set_fake_reorder_percentage(int32_t fake_packet_reorder_percentage) {
     DCHECK(clock_);
-    base::AutoLock locked(config_mutex_);
+    QuicWriterMutexLock lock(&config_mutex_);
     DCHECK(!fake_packet_delay_.IsZero());
     fake_packet_reorder_percentage_ = fake_packet_reorder_percentage;
   }
 
   // The delay before writing this packet.
   void set_fake_packet_delay(QuicTime::Delta fake_packet_delay) {
     DCHECK(clock_);
-    base::AutoLock locked(config_mutex_);
+    QuicWriterMutexLock lock(&config_mutex_);
     fake_packet_delay_ = fake_packet_delay;
   }
 
   // The maximum bandwidth and buffer size of the connection.  When these are
   // set, packets will be delayed until a connection with that bandwidth would
   // transmit it.  Once the |buffer_size| is reached, all new packets are
   // dropped.
   void set_max_bandwidth_and_buffer_size(QuicBandwidth fake_bandwidth,
                                          QuicByteCount buffer_size) {
     DCHECK(clock_);
-    base::AutoLock locked(config_mutex_);
+    QuicWriterMutexLock lock(&config_mutex_);
     fake_bandwidth_ = fake_bandwidth;
     buffer_size_ = buffer_size;
   }
 
   // Useful for reproducing very flaky issues.
   void set_seed(uint64_t seed) { simple_random_.set_seed(seed); }
 
  private:
   // Writes out the next packet to the contained writer and returns the time
   // for the next delayed packet to be written.
@@ skipping 29 matching lines @@
   const QuicClock* clock_;
   std::unique_ptr<QuicAlarm> write_unblocked_alarm_;
   std::unique_ptr<QuicAlarm> delay_alarm_;
   std::unique_ptr<Delegate> on_can_write_;
   net::test::SimpleRandom simple_random_;
   // Stored packets delayed by fake packet delay or bandwidth restrictions.
   DelayedPacketList delayed_packets_;
   QuicByteCount cur_buffer_size_;
   uint64_t num_calls_to_write_;
 
-  base::Lock config_mutex_;
-  int32_t fake_packet_loss_percentage_;
-  int32_t fake_drop_first_n_packets_;
-  int32_t fake_blocked_socket_percentage_;
-  int32_t fake_packet_reorder_percentage_;
-  QuicTime::Delta fake_packet_delay_;
-  QuicBandwidth fake_bandwidth_;
-  QuicByteCount buffer_size_;
+  QuicMutex config_mutex_;
+  int32_t fake_packet_loss_percentage_ GUARDED_BY(config_mutex_);
+  int32_t fake_drop_first_n_packets_ GUARDED_BY(config_mutex_);
+  int32_t fake_blocked_socket_percentage_ GUARDED_BY(config_mutex_);
+  int32_t fake_packet_reorder_percentage_ GUARDED_BY(config_mutex_);
+  QuicTime::Delta fake_packet_delay_ GUARDED_BY(config_mutex_);
+  QuicBandwidth fake_bandwidth_ GUARDED_BY(config_mutex_);
+  QuicByteCount buffer_size_ GUARDED_BY(config_mutex_);
 
   DISALLOW_COPY_AND_ASSIGN(PacketDroppingTestWriter);
 };
 
 }  // namespace test
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_TEST_TOOLS_PACKET_DROPPING_TEST_WRITER_H_