Split memory-related routines out of base/process_util.h into base/process/memory.h.

base/process/memory.h

+// Copyright (c) 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 BASE_PROCESS_MEMORY_H_
+#define BASE_PROCESS_MEMORY_H_
+
+#include "base/basictypes.h"
+#include "base/base_export.h"
+#include "base/process.h"
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+namespace base {
+
+// Enables low fragmentation heap (LFH) for every heaps of this process. This
+// won't have any effect on heaps created after this function call. It will not
+// modify data allocated in the heaps before calling this function. So it is
+// better to call this function early in initialization and again before
+// entering the main loop.
+// Note: Returns true on Windows 2000 without doing anything.
+BASE_EXPORT bool EnableLowFragmentationHeap();
+
+// Enables 'terminate on heap corruption' flag. Helps protect against heap
+// overflow. Has no effect if the OS doesn't provide the necessary facility.
+BASE_EXPORT void EnableTerminationOnHeapCorruption();
+
+// Turns on process termination if memory runs out.
+BASE_EXPORT void EnableTerminationOnOutOfMemory();
+
+#if defined(USE_LINUX_BREAKPAD)
+BASE_EXPORT extern size_t g_oom_size;
+#endif
+
+#if defined(OS_WIN)
+// Returns the module handle to which an address belongs. The reference count
+// of the module is not incremented.
+BASE_EXPORT HMODULE GetModuleFromAddress(void* address);
+#endif
+
+#if defined(OS_LINUX) || defined(OS_ANDROID)
+// The maximum allowed value for the OOM score.
+const int kMaxOomScore = 1000;
+
+// This adjusts /proc/<pid>/oom_score_adj so the Linux OOM killer will
+// prefer to kill certain process types over others. The range for the
+// adjustment is [-1000, 1000], with [0, 1000] being user accessible.
+// If the Linux system doesn't support the newer oom_score_adj range
+// of [0, 1000], then we revert to using the older oom_adj, and
+// translate the given value into [0, 15].  Some aliasing of values
+// may occur in that case, of course.
+BASE_EXPORT bool AdjustOOMScore(ProcessId process, int score);
+#endif
+
+#if defined(OS_MACOSX)
+// Very large images or svg canvases can cause huge mallocs.  Skia
+// does tricks on tcmalloc-based systems to allow malloc to fail with
+// a NULL rather than hit the oom crasher.  This replicates that for
+// OSX.
+//
+// IF YOU USE THIS WITHOUT CONSULTING YOUR FRIENDLY OSX DEVELOPER,
+// YOUR CODE IS LIKELY TO BE REVERTED.  THANK YOU.
+BASE_EXPORT void* UncheckedMalloc(size_t size);
+#endif  // defined(OS_MACOSX)
+
+}  // namespace base
+
+#endif  // BASE_PROCESS_MEMORY_H_