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Side by Side Diff: mojo/system/dispatcher.h

Issue 25895002: Simple shell that loads a dll and calls an entrypoint function passing in a handle to a pipe create… (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: exports to template instantiations Created 7 years, 2 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 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 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 #ifndef MOJO_SYSTEM_DISPATCHER_H_ 5 #ifndef MOJO_SYSTEM_DISPATCHER_H_
6 #define MOJO_SYSTEM_DISPATCHER_H_ 6 #define MOJO_SYSTEM_DISPATCHER_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "base/memory/ref_counted.h" 9 #include "base/memory/ref_counted.h"
10 #include "base/synchronization/lock.h" 10 #include "base/synchronization/lock.h"
11 #include "mojo/public/system/core.h" 11 #include "mojo/public/system/core.h"
12 #include "mojo/public/system/system_export.h"
12 13
13 namespace mojo { 14 namespace mojo {
14 namespace system { 15 namespace system {
15 16
16 class Waiter; 17 class Waiter;
17 18
18 // A |Dispatcher| implements Mojo primitives that are "attached" to a particular 19 // A |Dispatcher| implements Mojo primitives that are "attached" to a particular
19 // handle. This includes most (all?) primitives except for |MojoWait...()|. This 20 // handle. This includes most (all?) primitives except for |MojoWait...()|. This
20 // object is thread-safe, with its state being protected by a single lock 21 // object is thread-safe, with its state being protected by a single lock
21 // |lock_|, which is also made available to implementation subclasses (via the 22 // |lock_|, which is also made available to implementation subclasses (via the
22 // |lock()| method). 23 // |lock()| method).
23 class Dispatcher : public base::RefCountedThreadSafe<Dispatcher> { 24 class MOJO_SYSTEM_EXPORT Dispatcher :
25 public base::RefCountedThreadSafe<Dispatcher> {
24 public: 26 public:
25 // These methods implement the various primitives named |Mojo...()|. These 27 // These methods implement the various primitives named |Mojo...()|. These
26 // take |lock_| and handle races with |Close()|. Then they call out to 28 // take |lock_| and handle races with |Close()|. Then they call out to
27 // subclasses' |...ImplNoLock()| methods (still under |lock_|), which actually 29 // subclasses' |...ImplNoLock()| methods (still under |lock_|), which actually
28 // implement the primitives. 30 // implement the primitives.
29 // NOTE(vtl): This puts a big lock around each dispatcher (i.e., handle), and 31 // NOTE(vtl): This puts a big lock around each dispatcher (i.e., handle), and
30 // prevents the various |...ImplNoLock()|s from releasing the lock as soon as 32 // prevents the various |...ImplNoLock()|s from releasing the lock as soon as
31 // possible. If this becomes an issue, we can rethink this. 33 // possible. If this becomes an issue, we can rethink this.
32 MojoResult Close(); 34 MojoResult Close();
33 MojoResult WriteMessage(const void* bytes, 35 MojoResult WriteMessage(const void* bytes,
(...skipping 63 matching lines...) Expand 10 before | Expand all | Expand 10 after
97 mutable base::Lock lock_; 99 mutable base::Lock lock_;
98 bool is_closed_; 100 bool is_closed_;
99 101
100 DISALLOW_COPY_AND_ASSIGN(Dispatcher); 102 DISALLOW_COPY_AND_ASSIGN(Dispatcher);
101 }; 103 };
102 104
103 } // namespace system 105 } // namespace system
104 } // namespace mojo 106 } // namespace mojo
105 107
106 #endif // MOJO_SYSTEM_DISPATCHER_H_ 108 #endif // MOJO_SYSTEM_DISPATCHER_H_
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