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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 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 BASE_PROCESS_MEMORY_H_ | 5 #ifndef BASE_PROCESS_MEMORY_H_ |
6 #define BASE_PROCESS_MEMORY_H_ | 6 #define BASE_PROCESS_MEMORY_H_ |
7 | 7 |
8 #include "base/base_export.h" | 8 #include "base/base_export.h" |
9 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
10 #include "base/process/process_handle.h" | 10 #include "base/process/process_handle.h" |
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46 // This adjusts /proc/<pid>/oom_score_adj so the Linux OOM killer will | 46 // This adjusts /proc/<pid>/oom_score_adj so the Linux OOM killer will |
47 // prefer to kill certain process types over others. The range for the | 47 // prefer to kill certain process types over others. The range for the |
48 // adjustment is [-1000, 1000], with [0, 1000] being user accessible. | 48 // adjustment is [-1000, 1000], with [0, 1000] being user accessible. |
49 // If the Linux system doesn't support the newer oom_score_adj range | 49 // If the Linux system doesn't support the newer oom_score_adj range |
50 // of [0, 1000], then we revert to using the older oom_adj, and | 50 // of [0, 1000], then we revert to using the older oom_adj, and |
51 // translate the given value into [0, 15]. Some aliasing of values | 51 // translate the given value into [0, 15]. Some aliasing of values |
52 // may occur in that case, of course. | 52 // may occur in that case, of course. |
53 BASE_EXPORT bool AdjustOOMScore(ProcessId process, int score); | 53 BASE_EXPORT bool AdjustOOMScore(ProcessId process, int score); |
54 #endif | 54 #endif |
55 | 55 |
56 #if defined(OS_MACOSX) | 56 // Special allocator functions for callers that want to check for OOM. |
57 // Very large images or svg canvases can cause huge mallocs. Skia | 57 // These will not abort if the allocation fails even if |
58 // does tricks on tcmalloc-based systems to allow malloc to fail with | 58 // EnableTerminationOnOutOfMemory has been called. |
59 // a NULL rather than hit the oom crasher. This replicates that for | 59 // This can be useful for huge and/or unpredicteble size memory allocatios. |
Ken Russell (switch to Gerrit)
2013/10/31 22:12:48
typos: unpredictable, allocations
| |
60 // OSX. | |
61 // | |
62 // IF YOU USE THIS WITHOUT CONSULTING YOUR FRIENDLY OSX DEVELOPER, | |
63 // YOUR CODE IS LIKELY TO BE REVERTED. THANK YOU. | |
64 BASE_EXPORT void* UncheckedMalloc(size_t size); | 60 BASE_EXPORT void* UncheckedMalloc(size_t size); |
65 BASE_EXPORT void* UncheckedCalloc(size_t num_items, size_t size); | 61 BASE_EXPORT void* UncheckedCalloc(size_t num_items, size_t size); |
66 #endif // defined(OS_MACOSX) | |
67 | 62 |
68 } // namespace base | 63 } // namespace base |
69 | 64 |
70 #endif // BASE_PROCESS_MEMORY_H_ | 65 #endif // BASE_PROCESS_MEMORY_H_ |
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