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logvisor
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Recursive mutex for avoidng deadlocks during logging

This commit is contained in:
Jack Andersen 2016-09-11 11:14:48 -10:00
parent c839ce774c
commit 9285d183d7
2 changed files with 4 additions and 13 deletions
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5
include/logvisor/logvisor.hpp
View File

@ -87,13 +87,14 @@ extern std::atomic_uint_fast64_t FrameIndex;
*
* Ensures logging streams aren't written concurrently
*/
extern std::mutex LogMutex;
extern std::recursive_mutex LogMutex;
/**
* @brief Take a centralized lock for the logging output stream(s)
* @return RAII mutex lock
*/
static inline std::unique_lock<std::mutex> LockLog() {return std::unique_lock<std::mutex>{LogMutex};}
static inline std::unique_lock<std::recursive_mutex> LockLog()
{return std::unique_lock<std::recursive_mutex>{LogMutex};}
/**
* @brief Restore centralized logger vector to default state (silent operation)

12
lib/logvisor.cpp
View File

@ -157,7 +157,7 @@ static std::chrono::steady_clock::time_point GlobalStart = MonoClock.now();
static inline std::chrono::steady_clock::duration CurrentUptime()
{return MonoClock.now() - GlobalStart;}
std::atomic_uint_fast64_t FrameIndex(0);
std::mutex LogMutex;
std::recursive_mutex LogMutex;
static inline int ConsoleWidth()
{
@ -184,7 +184,6 @@ static const char* Term = nullptr;
bool XtermColor = false;
struct ConsoleLogger : public ILogger
{
std::mutex m;
ConsoleLogger()
{
#if _WIN32
@ -333,7 +332,6 @@ struct ConsoleLogger : public ILogger
void report(const char* modName, Level severity,
const char* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
_reportHead(modName, nullptr, severity);
vfprintf(stderr, format, ap);
fprintf(stderr, "\n");
@ -342,7 +340,6 @@ struct ConsoleLogger : public ILogger
void report(const char* modName, Level severity,
const wchar_t* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
_reportHead(modName, nullptr, severity);
vfwprintf(stderr, format, ap);
fprintf(stderr, "\n");
@ -352,7 +349,6 @@ struct ConsoleLogger : public ILogger
const char* file, unsigned linenum,
const char* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
char sourceInfo[128];
snprintf(sourceInfo, 128, "%s:%u", file, linenum);
_reportHead(modName, sourceInfo, severity);
@ -364,7 +360,6 @@ struct ConsoleLogger : public ILogger
const char* file, unsigned linenum,
const wchar_t* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
char sourceInfo[128];
snprintf(sourceInfo, 128, "%s:%u", file, linenum);
_reportHead(modName, sourceInfo, severity);
@ -408,7 +403,6 @@ void RegisterStandardExceptions()
struct FileLogger : public ILogger
{
FILE* fp;
std::mutex m;
virtual void openFile()=0;
virtual void closeFile() {fclose(fp);}
@ -456,7 +450,6 @@ struct FileLogger : public ILogger
void report(const char* modName, Level severity,
const char* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
openFile();
_reportHead(modName, nullptr, severity);
vfprintf(fp, format, ap);
@ -467,7 +460,6 @@ struct FileLogger : public ILogger
void report(const char* modName, Level severity,
const wchar_t* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
openFile();
_reportHead(modName, nullptr, severity);
vfwprintf(fp, format, ap);
@ -479,7 +471,6 @@ struct FileLogger : public ILogger
const char* file, unsigned linenum,
const char* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
openFile();
char sourceInfo[128];
snprintf(sourceInfo, 128, "%s:%u", file, linenum);
@ -493,7 +484,6 @@ struct FileLogger : public ILogger
const char* file, unsigned linenum,
const wchar_t* format, va_list ap)
{
std::unique_lock<std::mutex> lk(m);
openFile();
char sourceInfo[128];
snprintf(sourceInfo, 128, "%s:%u", file, linenum);