void Print(const char* aName, LogLevel aLevel, const char* aFmt, va_list aArgs)
{
const size_t kBuffSize = 1024;
char buff[kBuffSize];
char* buffToWrite = buff;
// For backwards compat we need to use the NSPR format string versions
// of sprintf and friends and then hand off to printf.
va_list argsCopy;
va_copy(argsCopy, aArgs);
size_t charsWritten = PR_vsnprintf(buff, kBuffSize, aFmt, argsCopy);
va_end(argsCopy);
if (charsWritten == kBuffSize - 1) {
// We may have maxed out, allocate a buffer instead.
buffToWrite = PR_vsmprintf(aFmt, aArgs);
charsWritten = strlen(buffToWrite);
}
// Determine if a newline needs to be appended to the message.
const char* newline = "";
if (charsWritten == 0 || buffToWrite[charsWritten - 1] != '\n') {
newline = "\n";
}
FILE* out = mOutFile ? mOutFile : stderr;
// This differs from the NSPR format in that we do not output the
// opaque system specific thread pointer (ie pthread_t) cast
// to a long. The address of the current PR_Thread continues to be
// prefixed.
//
// Additionally we prefix the output with the abbreviated log level
// and the module name.
if (!mAddTimestamp) {
fprintf_stderr(out,
"[%p]: %s/%s %s%s",
PR_GetCurrentThread(), ToLogStr(aLevel),
aName, buffToWrite, newline);
} else {
PRExplodedTime now;
PR_ExplodeTime(PR_Now(), PR_GMTParameters, &now);
fprintf_stderr(
out,
"%04d-%02d-%02d %02d:%02d:%02d.%06d UTC - [%p]: %s/%s %s%s",
now.tm_year, now.tm_month + 1, now.tm_mday,
now.tm_hour, now.tm_min, now.tm_sec, now.tm_usec,
PR_GetCurrentThread(), ToLogStr(aLevel),
aName, buffToWrite, newline);
}
if (mIsSync) {
fflush(out);
}
if (buffToWrite != buff) {
PR_smprintf_free(buffToWrite);
}
}
void Print(const char* aName, LogLevel aLevel, const char* aFmt, va_list aArgs)
{
const size_t kBuffSize = 1024;
char buff[kBuffSize];
char* buffToWrite = buff;
// For backwards compat we need to use the NSPR format string versions
// of sprintf and friends and then hand off to printf.
va_list argsCopy;
va_copy(argsCopy, aArgs);
size_t charsWritten = PR_vsnprintf(buff, kBuffSize, aFmt, argsCopy);
va_end(argsCopy);
if (charsWritten == kBuffSize - 1) {
// We may have maxed out, allocate a buffer instead.
buffToWrite = PR_vsmprintf(aFmt, aArgs);
charsWritten = strlen(buffToWrite);
}
// Determine if a newline needs to be appended to the message.
const char* newline = "";
if (charsWritten == 0 || buffToWrite[charsWritten - 1] != '\n') {
newline = "\n";
}
FILE* out = stderr;
// In case we use rotate, this ensures the FILE is kept alive during
// its use. Increased before we load mOutFile.
++mPrintEntryCount;
detail::LogFile* outFile = mOutFile;
if (outFile) {
out = outFile->File();
}
// This differs from the NSPR format in that we do not output the
// opaque system specific thread pointer (ie pthread_t) cast
// to a long. The address of the current PR_Thread continues to be
// prefixed.
//
// Additionally we prefix the output with the abbreviated log level
// and the module name.
PRThread *currentThread = PR_GetCurrentThread();
const char *currentThreadName = (mMainThread == currentThread)
? "Main Thread"
: PR_GetThreadName(currentThread);
char noNameThread[40];
if (!currentThreadName) {
SprintfLiteral(noNameThread, "Unnamed thread %p", currentThread);
currentThreadName = noNameThread;
}
if (!mAddTimestamp) {
fprintf_stderr(out,
"[%s]: %s/%s %s%s",
currentThreadName, ToLogStr(aLevel),
aName, buffToWrite, newline);
} else {
PRExplodedTime now;
PR_ExplodeTime(PR_Now(), PR_GMTParameters, &now);
fprintf_stderr(
out,
"%04d-%02d-%02d %02d:%02d:%02d.%06d UTC - [%s]: %s/%s %s%s",
now.tm_year, now.tm_month + 1, now.tm_mday,
now.tm_hour, now.tm_min, now.tm_sec, now.tm_usec,
currentThreadName, ToLogStr(aLevel),
aName, buffToWrite, newline);
}
if (mIsSync) {
fflush(out);
}
if (buffToWrite != buff) {
PR_smprintf_free(buffToWrite);
}
if (mRotate > 0 && outFile) {
int32_t fileSize = ftell(out);
if (fileSize > mRotate) {
uint32_t fileNum = outFile->Num();
uint32_t nextFileNum = fileNum + 1;
if (nextFileNum >= kRotateFilesNumber) {
nextFileNum = 0;
}
// And here is the trick. The current out-file remembers its order
// number. When no other thread shifted the global file number yet,
// we are the thread to open the next file.
if (mOutFileNum.compareExchange(fileNum, nextFileNum)) {
// We can work with mToReleaseFile because we are sure the
// mPrintEntryCount can't drop to zero now - the condition
// to actually delete what's stored in that member.
// And also, no other thread can enter this piece of code
// because mOutFile is still holding the current file with
// the non-shifted number. The compareExchange() above is
// a no-op for other threads.
outFile->mNextToRelease = mToReleaseFile;
mToReleaseFile = outFile;
mOutFile = OpenFile(false, nextFileNum);
}
}
}
if (--mPrintEntryCount == 0 && mToReleaseFile) {
// We were the last Print() entered, if there is a file to release
// do it now. exchange() is atomic and makes sure we release the file
// only once on one thread.
detail::LogFile* release = mToReleaseFile.exchange(nullptr);
delete release;
}
}
