Makes pm mutex optional via configuration flag

src/operators/pm.cc

@@ -40,7 +40,9 @@ Pm::~Pm() {
 
     free(m_p);
     m_p = NULL;
+#ifdef MODSEC_MUTEX_ON_PM
     pthread_mutex_destroy(&m_lock);
+#endif
 }
 
 
@@ -87,9 +89,13 @@ bool Pm::evaluate(Transaction *transaction, Rule *rule,
     pt.parser = m_p;
     pt.ptr = NULL;
     const char *match = NULL;
+#ifdef MODSEC_MUTEX_ON_PM
     pthread_mutex_lock(&m_lock);
+#endif
     rc = acmp_process_quick(&pt, &match, input.c_str(), input.length());
+#ifdef MODSEC_MUTEX_ON_PM
     pthread_mutex_unlock(&m_lock);
+#endif
     bool capture = rule && rule->getActionsByName("capture").size() > 0;
 
     if (rc > 0 && transaction) {
@@ -116,8 +122,9 @@ bool Pm::init(const std::string &file, std::string *error) {
     std::istringstream *iss;
     const char *err = NULL;
 
+#ifdef MODSEC_MUTEX_ON_PM
     pthread_mutex_init(&m_lock, NULL);
-
+#endif
     char *content = parse_pm_content(m_param.c_str(), m_param.length(), &err);
     if (content == NULL) {
         iss = new std::istringstream(m_param);

src/operators/pm.h

@@ -56,8 +56,10 @@ class Pm : public Operator {
  protected:
     ACMP *m_p;
 
+#ifdef MODSEC_MUTEX_ON_PM
  private:
     pthread_mutex_t m_lock;
+#endif
 };