#include "event_client.h"
-/*
- * To create a thread you must call one of the create thread functions.
- * You must pass it the address of (a pointer to a CtdlThreadNode initialised to NULL) like this
- * struct CtdlThreadNode *node = NULL;
- * pass in &node
- * If the thread is created *node will point to the thread control structure for the created thread.
- * If the thread creation fails *node remains NULL
- * Do not free the memory pointed to by *node, it doesn't belong to you.
- * This new interface duplicates much of the eCrash stuff. We should go for closer integration since that would
- * remove the need for the calls to eCrashRegisterThread and friends
- */
-
-static int num_threads = 0; /* Current number of threads */
+int num_workers = 0; /* Current number of worker threads */
+int active_workers = 0; /* Number of ACTIVE worker threads */
pthread_key_t ThreadKey;
pthread_mutex_t Critters[MAX_SEMAPHORES]; /* Things needing locking */
struct thread_tsd masterTSD;
ret = pthread_attr_setstacksize(&attr, THREADSTACKSIZE);
ret = pthread_create(&thread, &attr, CTC_backend, (void *)start_routine);
if (ret != 0) syslog(LOG_EMERG, "pthread_create() : %s", strerror(errno));
-
- ++num_threads;
}
CtdlThreadCreate(select_on_master);
- /* FIXME temporary fixed size pool of worker threads */
- CtdlThreadCreate(worker_thread);
- CtdlThreadCreate(worker_thread);
- CtdlThreadCreate(worker_thread);
+ /* Begin with one worker thread. We will expand the pool if necessary */
CtdlThreadCreate(worker_thread);
- CtdlThreadCreate(worker_thread);
- CtdlThreadCreate(worker_thread);
- CtdlThreadCreate(worker_thread);
- CtdlThreadCreate(worker_thread);
-
- /* At this point I am a union worker and therefore serve no useful purpose. */
+ /* The supervisor thread monitors worker threads and spawns more of them if it finds that
+ * they are all in use. FIXME make the 256 max threads a configurable value.
+ */
while(!CtdlThreadCheckStop()) {
- sleep(3);
+ if ((active_workers == num_workers) && (num_workers < 256)) {
+ syslog(LOG_DEBUG, "worker threads: %d, active: %d\n", num_workers, active_workers);
+ CtdlThreadCreate(worker_thread);
+ syslog(LOG_DEBUG, "worker threads: %d, active: %d\n", num_workers, active_workers);
+ }
+ sleep(1);
}
/* Shut down */