Add Coercion.lhs

[ghc-hetmet.git] / rts / Task.c

diff --git a/rts/Task.c b/rts/Task.c
index 9923609..11307a7 100644 (file)
--- a/rts/Task.c
+++ b/rts/Task.c
@@ -17,6 +17,7 @@
 #include "RtsFlags.h"
 #include "Schedule.h"
 #include "Hash.h"
+#include "Trace.h"
 
 #if HAVE_SIGNAL_H
 #include <signal.h>
@@ -27,8 +28,6 @@
 Task *all_tasks = NULL;
 static Task *task_free_list = NULL; // singly-linked
 static nat taskCount;
-#define DEFAULT_MAX_WORKERS 64
-static nat maxWorkers; // we won't create more workers than this
 static nat tasksRunning;
 static nat workerCount;
 
@@ -57,7 +56,6 @@ initTaskManager (void)
        taskCount = 0;
        workerCount = 0;
        tasksRunning = 0;
-       maxWorkers = DEFAULT_MAX_WORKERS;
        initialized = 1;
 #if defined(THREADED_RTS)
        newThreadLocalKey(&currentTaskKey);
@@ -69,7 +67,23 @@ initTaskManager (void)
 void
 stopTaskManager (void)
 {
-    IF_DEBUG(scheduler, sched_belch("stopping task manager, %d tasks still running", tasksRunning));
+    Task *task, *next;
+
+    debugTrace(DEBUG_sched, 
+              "stopping task manager, %d tasks still running",
+              tasksRunning);
+
+    ACQUIRE_LOCK(&sched_mutex);
+    for (task = task_free_list; task != NULL; task = next) {
+        next = task->next;
+#if defined(THREADED_RTS)
+        closeCondition(&task->cond);
+        closeMutex(&task->lock);
+#endif
+        stgFree(task);
+    }
+    task_free_list = NULL;
+    RELEASE_LOCK(&sched_mutex);
 }
 
 
@@ -144,7 +158,7 @@ newBoundTask (void)
 
     taskEnter(task);
 
-    IF_DEBUG(scheduler,sched_belch("new task (taskCount: %d)", taskCount););
+    debugTrace(DEBUG_sched, "new task (taskCount: %d)", taskCount);
     return task;
 }
 
@@ -168,7 +182,7 @@ boundTaskExiting (Task *task)
     task_free_list = task;
     RELEASE_LOCK(&sched_mutex);
 
-    IF_DEBUG(scheduler,sched_belch("task exiting"));
+    debugTrace(DEBUG_sched, "task exiting");
 }
 
 #ifdef THREADED_RTS
@@ -182,7 +196,7 @@ discardTask (Task *task)
 {
     ASSERT_LOCK_HELD(&sched_mutex);
     if (!task->stopped) {
-       IF_DEBUG(scheduler,sched_belch("discarding task %p", TASK_ID(task)));
+       debugTrace(DEBUG_sched, "discarding task %ld", (long)TASK_ID(task));
        task->cap = NULL;
        task->tso = NULL;
        task->stopped = rtsTrue;
@@ -233,7 +247,7 @@ workerTaskStop (Task *task)
 void
 resetTaskManagerAfterFork (void)
 {
-#warning TODO!
+    // TODO!
     taskCount = 0;
 }
 
@@ -247,9 +261,6 @@ startWorkerTask (Capability *cap,
   OSThreadId tid;
   Task *task;
 
-  if (workerCount >= maxWorkers) {
-      barf("too many workers; runaway worker creation?");
-  }
   workerCount++;
 
   // A worker always gets a fresh Task structure.
@@ -272,10 +283,11 @@ startWorkerTask (Capability *cap,
 
   r = createOSThread(&tid, (OSThreadProc *)taskStart, task);
   if (r != 0) {
-    barf("startTask: Can't create new task");
+    sysErrorBelch("failed to create OS thread");
+    stg_exit(EXIT_FAILURE);
   }
 
-  IF_DEBUG(scheduler,sched_belch("new worker task (taskCount: %d)", taskCount););
+  debugTrace(DEBUG_sched, "new worker task (taskCount: %d)", taskCount);
 
   task->id = tid;
 
@@ -309,7 +321,7 @@ printAllTasks(void)
                debugBelch("on capability %d, ", task->cap->no);
            }
            if (task->tso) {
-               debugBelch("bound to thread %d", task->tso->id);
+             debugBelch("bound to thread %lu", (unsigned long)task->tso->id);
            } else {
                debugBelch("worker");
            }