Commit 92b6c650 authored by Xavier Thompson's avatar Xavier Thompson

Protect contention-detection logging with a global static mutex

parent ddbf3004
......@@ -60,10 +60,12 @@
};
class LogLock : public RecursiveUpgradeableRWLock {
static pthread_mutex_t log_guard;
public:
void wlock();
void rlock();
};
pthread_mutex_t LogLock::log_guard = PTHREAD_MUTEX_INITIALIZER;
struct CyPyObject {
PyObject_HEAD
......@@ -477,12 +479,14 @@ void LogLock::rlock() {
if (this->write_count > 0) {
pid_t owner_id = this->owner_id;
pthread_mutex_lock(&(LogLock::log_guard));
printf(
"Contention with a writer detected while rlocking lock [%p] in thread #%d:\n"
" - lock was already wlocked by thread %d\n"
"\n"
,this, caller_id, owner_id
);
pthread_mutex_unlock(&(LogLock::log_guard));
}
while (this->write_count > 0) {
......@@ -513,19 +517,23 @@ void LogLock::wlock() {
if (this->readers_nb > 0) {
if (owner_id == CyObject_MANY_OWNERS) {
pthread_mutex_lock(&(LogLock::log_guard));
printf(
"Contention with several other reader threads detected while wlocking lock [%p] in thread #%d:\n"
"\n"
,this, caller_id
);
pthread_mutex_unlock(&(LogLock::log_guard));
}
else {
pthread_mutex_lock(&(LogLock::log_guard));
printf(
"Contention with a reader thread detected while wlocking lock [%p] in thread #%d:\n"
" - reader thread is %d\n"
"\n"
,this, caller_id, owner_id
);
pthread_mutex_unlock(&(LogLock::log_guard));
}
}
......@@ -534,12 +542,14 @@ void LogLock::wlock() {
}
if (this->write_count > 0) {
pthread_mutex_lock(&(LogLock::log_guard));
printf(
"Contention with another writer detected while wlocking lock [%p] in thread #%d:\n"
" - lock owner is thread %d\n"
" - lock was already wlocked by thread %d\n"
"\n"
,this, caller_id, owner_id
);
pthread_mutex_unlock(&(LogLock::log_guard));
}
while (this->write_count > 0) {
......
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