gecko/xpcom/threads/nsMemoryPressure.cpp

54 lines
1.6 KiB
C++
Raw Normal View History

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsMemoryPressure.h"
#include "mozilla/Assertions.h"
#include "mozilla/Atomics.h"
#include "nsThreadUtils.h"
using namespace mozilla;
static Atomic<int32_t, Relaxed> sMemoryPressurePending;
Bug 895322 - Part 1: Replace the usages of MOZ_STATIC_ASSERT with C++11 static_assert; r=Waldo This patch was mostly generated by running the following scripts on the codebase, with some manual changes made afterwards: # static_assert.sh #!/bin/bash # Command to convert an NSPR integer type to the equivalent standard integer type function convert() { echo "Converting $1 to $2..." find . ! -wholename "*nsprpub*" \ ! -wholename "*security/nss*" \ ! -wholename "*/.hg*" \ ! -wholename "obj-ff-dbg*" \ ! -name nsXPCOMCID.h \ ! -name prtypes.h \ -type f \ \( -iname "*.cpp" \ -o -iname "*.h" \ -o -iname "*.cc" \ -o -iname "*.mm" \) | \ xargs -n 1 `dirname $0`/assert_replacer.py #sed -i -e "s/\b$1\b/$2/g" } convert MOZ_STATIC_ASSERT static_assert hg rev --no-backup mfbt/Assertions.h \ media/webrtc/signaling/src/sipcc/core/includes/ccapi.h \ modules/libmar/src/mar_private.h \ modules/libmar/src/mar.h # assert_replacer.py #!/usr/bin/python import sys import re pattern = re.compile(r"\bMOZ_STATIC_ASSERT\b") def replaceInPlace(fname): print fname f = open(fname, "rw+") lines = f.readlines() for i in range(0, len(lines)): while True: index = re.search(pattern, lines[i]) if index != None: index = index.start() lines[i] = lines[i][0:index] + "static_assert" + lines[i][index+len("MOZ_STATIC_ASSERT"):] for j in range(i + 1, len(lines)): if lines[j].find(" ", index) == index: lines[j] = lines[j][0:index] + lines[j][index+4:] else: break else: break f.seek(0, 0) f.truncate() f.write("".join(lines)) f.close() argc = len(sys.argv) for i in range(1, argc): replaceInPlace(sys.argv[i]) --HG-- extra : rebase_source : 4b4a4047d82f2c205b9fad8d56dfc3f1afc0b045
2013-07-18 10:59:53 -07:00
static_assert(MemPressure_None == 0,
"Bad static initialization with the default constructor.");
MemoryPressureState
NS_GetPendingMemoryPressure()
{
int32_t value = sMemoryPressurePending.exchange(MemPressure_None);
return MemoryPressureState(value);
}
void
NS_DispatchEventualMemoryPressure(MemoryPressureState state)
{
/*
* A new memory pressure event erases an ongoing memory pressure, but an
* existing "new" memory pressure event takes precedence over a new "ongoing"
* memory pressure event.
*/
switch (state) {
case MemPressure_None:
sMemoryPressurePending = MemPressure_None;
break;
case MemPressure_New:
sMemoryPressurePending = MemPressure_New;
break;
case MemPressure_Ongoing:
sMemoryPressurePending.compareExchange(MemPressure_None, MemPressure_Ongoing);
break;
}
}
nsresult
NS_DispatchMemoryPressure(MemoryPressureState state)
{
NS_DispatchEventualMemoryPressure(state);
nsCOMPtr<nsIRunnable> event = new nsRunnable;
return NS_DispatchToMainThread(event);
}