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[Support] Replace sys::Mutex with their standard equivalents.

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Only use a recursive mutex if it can be locked recursively.

llvm-svn: 369295
This commit is contained in:
Benjamin Kramer 2019-08-19 19:49:57 +00:00
parent 056f1b5cc7
commit 928071ae4e
3 changed files with 11 additions and 13 deletions
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8
llvm/lib/Support/CrashRecoveryContext.cpp
View File

@ -10,8 +10,8 @@
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/ThreadLocal.h"
#include <mutex>
#include <setjmp.h>
using namespace llvm;
@ -71,7 +71,7 @@ public:
}
static ManagedStatic<sys::Mutex> gCrashRecoveryContextMutex;
static ManagedStatic<std::mutex> gCrashRecoveryContextMutex;
static bool gCrashRecoveryEnabled = false;
static ManagedStatic<sys::ThreadLocal<const CrashRecoveryContext>>
@ -116,7 +116,7 @@ CrashRecoveryContext *CrashRecoveryContext::GetCurrent() {
}
void CrashRecoveryContext::Enable() {
sys::ScopedLock L(*gCrashRecoveryContextMutex);
std::lock_guard<std::mutex> L(*gCrashRecoveryContextMutex);
// FIXME: Shouldn't this be a refcount or something?
if (gCrashRecoveryEnabled)
return;
@ -125,7 +125,7 @@ void CrashRecoveryContext::Enable() {
}
void CrashRecoveryContext::Disable() {
sys::ScopedLock L(*gCrashRecoveryContextMutex);
std::lock_guard<std::mutex> L(*gCrashRecoveryContextMutex);
if (!gCrashRecoveryEnabled)
return;
gCrashRecoveryEnabled = false;

11
llvm/lib/Support/ManagedStatic.cpp
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@ -12,21 +12,20 @@
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/Threading.h"
#include <cassert>
#include <mutex>
using namespace llvm;
static const ManagedStaticBase *StaticList = nullptr;
static sys::Mutex *ManagedStaticMutex = nullptr;
static std::recursive_mutex *ManagedStaticMutex = nullptr;
static llvm::once_flag mutex_init_flag;
static void initializeMutex() {
ManagedStaticMutex = new sys::Mutex();
ManagedStaticMutex = new std::recursive_mutex();
}
static sys::Mutex* getManagedStaticMutex() {
static std::recursive_mutex *getManagedStaticMutex() {
llvm::call_once(mutex_init_flag, initializeMutex);
return ManagedStaticMutex;
}
@ -35,7 +34,7 @@ void ManagedStaticBase::RegisterManagedStatic(void *(*Creator)(),
void (*Deleter)(void*)) const {
assert(Creator);
if (llvm_is_multithreaded()) {
std::lock_guard<sys::Mutex> Lock(*getManagedStaticMutex());
std::lock_guard<std::recursive_mutex> Lock(*getManagedStaticMutex());
if (!Ptr.load(std::memory_order_relaxed)) {
void *Tmp = Creator();
@ -77,7 +76,7 @@ void ManagedStaticBase::destroy() const {
/// llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
void llvm::llvm_shutdown() {
std::lock_guard<sys::Mutex> Lock(*getManagedStaticMutex());
std::lock_guard<std::recursive_mutex> Lock(*getManagedStaticMutex());
while (StaticList)
StaticList->destroy();

5
llvm/lib/Support/Unix/Process.inc
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@ -15,7 +15,6 @@
#include "llvm/ADT/StringRef.h"
#include "llvm/Config/config.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Mutex.h"
#include <mutex>
#if HAVE_FCNTL_H
#include <fcntl.h>
@ -327,13 +326,13 @@ extern "C" int tigetnum(char *capname);
#endif
#ifdef HAVE_TERMINFO
static ManagedStatic<sys::Mutex> TermColorMutex;
static ManagedStatic<std::mutex> TermColorMutex;
#endif
static bool terminalHasColors(int fd) {
#ifdef HAVE_TERMINFO
// First, acquire a global lock because these C routines are thread hostile.
std::lock_guard<sys::Mutex> G(*TermColorMutex);
std::lock_guard<std::mutex> G(*TermColorMutex);
int errret = 0;
if (setupterm(nullptr, fd, &errret) != 0)