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Issue 186473002: Deprecate named base::SharedMemory. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: fix win Created 6 years, 9 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 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 "base/memory/shared_memory.h" 5 #include "base/memory/shared_memory.h"
6 6
7 #include <sys/mman.h> 7 #include <sys/mman.h>
8 8
9 #include "base/logging.h" 9 #include "base/logging.h"
10 #include "third_party/ashmem/ashmem.h" 10 #include "third_party/ashmem/ashmem.h"
11 11
12 namespace base { 12 namespace base {
13 13
14 // For Android, we use ashmem to implement SharedMemory. ashmem_create_region 14 // For Android, we use ashmem to implement SharedMemory. ashmem_create_region
15 // will automatically pin the region. We never explicitly call pin/unpin. When 15 // will automatically pin the region. We never explicitly call pin/unpin. When
16 // all the file descriptors from different processes associated with the region 16 // all the file descriptors from different processes associated with the region
17 // are closed, the memory buffer will go away. 17 // are closed, the memory buffer will go away.
18 18
19 bool SharedMemory::Create(const SharedMemoryCreateOptions& options) { 19 bool SharedMemory::Create(const SharedMemoryCreateOptions& options) {
20 DCHECK_EQ(-1, mapped_file_ ); 20 DCHECK_EQ(-1, mapped_file_ );
21 21
22 if (options.size > static_cast<size_t>(std::numeric_limits<int>::max())) 22 if (options.size > static_cast<size_t>(std::numeric_limits<int>::max()))
23 return false; 23 return false;
24 24
25 // "name" is just a label in ashmem. It is visible in /proc/pid/maps. 25 // "name" is just a label in ashmem. It is visible in /proc/pid/maps.
26 mapped_file_ = ashmem_create_region( 26 mapped_file_ = ashmem_create_region(
27 options.name == NULL ? "" : options.name->c_str(), 27 options.name_deprecated == NULL ? "" : options.name_deprecated->c_str(),
28 options.size); 28 options.size);
29 if (-1 == mapped_file_) { 29 if (-1 == mapped_file_) {
30 DLOG(ERROR) << "Shared memory creation failed"; 30 DLOG(ERROR) << "Shared memory creation failed";
31 return false; 31 return false;
32 } 32 }
33 33
34 int err = ashmem_set_prot_region(mapped_file_, 34 int err = ashmem_set_prot_region(mapped_file_,
35 PROT_READ | PROT_WRITE | PROT_EXEC); 35 PROT_READ | PROT_WRITE | PROT_EXEC);
36 if (err < 0) { 36 if (err < 0) {
37 DLOG(ERROR) << "Error " << err << " when setting protection of ashmem"; 37 DLOG(ERROR) << "Error " << err << " when setting protection of ashmem";
(...skipping 19 matching lines...) Expand all
57 return true; 57 return true;
58 } 58 }
59 59
60 bool SharedMemory::Open(const std::string& name, bool read_only) { 60 bool SharedMemory::Open(const std::string& name, bool read_only) {
61 // ashmem doesn't support name mapping 61 // ashmem doesn't support name mapping
62 NOTIMPLEMENTED(); 62 NOTIMPLEMENTED();
63 return false; 63 return false;
64 } 64 }
65 65
66 } // namespace base 66 } // namespace base
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