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ok, this seems to be the right fix for the basic scheduler.

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Original commit message from CVS:
ok, this seems to be the right fix for the basic scheduler.
I'd appreciate it if :
a) someone looks over these minimal changes and tells me if they're done
in the right way (especially the alignment argument ;))
b) others run lots of pipes with basic and tell me if they still have
issues
If all goes well I want to revert to the basic scheduler and do a release
This commit is contained in:
Thomas Vander Stichele 2002-06-26 08:22:17 +00:00
parent f4046ced1c
commit b7bc06aee5
3 changed files with 39 additions and 3 deletions
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39
gst/cothreads.c
View file

@ -179,11 +179,18 @@ cothread_create (cothread_context *ctx)
stack_end = (guchar *) ((gulong) sp & ~(STACK_SIZE - 1));
thread = (cothread_state *) (stack_end + ((slot - 1) * COTHREAD_STACKSIZE));
GST_DEBUG (GST_CAT_COTHREADS, "new stack at %p", thread);
GST_DEBUG (GST_CAT_COTHREADS,
"new cothread slot stack from %p to %p (size %ld)",
thread, thread + COTHREAD_STACKSIZE - 1,
(long) COTHREAD_STACKSIZE);
GST_DEBUG (GST_CAT_COTHREADS, "going into mmap");
/* the mmap is used to reserve part of the stack
* ie. we state explicitly that we are going to use it */
munmap ((void *) thread, COTHREAD_STACKSIZE);
mmaped = mmap ((void *) thread, COTHREAD_STACKSIZE,
PROT_READ | PROT_WRITE | PROT_EXEC, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
GST_DEBUG (GST_CAT_COTHREADS, "coming out of mmap");
if (mmaped == MAP_FAILED) {
perror ("mmap'ing cothread stack space");
@ -446,6 +453,34 @@ cothread_context_get_data (cothread_state * thread, gchar * key)
return g_hash_table_lookup (ctx->data, key);
}
/**
* cothreads_stackquery:
* @stack: Will be set to point to the allocated stack location
* @stacksize: Will be set to the size of the allocated stack
*
* Returns: #TRUE on success, #FALSE otherwise.
*/
gboolean
cothread_stackquery (void **stack, glong* stacksize)
{
/* wingo: use posix_memalign to allocate a 2M-aligned, 2M stack */
int retval = 0;
retval = posix_memalign (stack, STACK_SIZE, STACK_SIZE);
if (retval != 0)
{
g_warning ("Could not posix_memalign stack !\n");
*stacksize = 0;
return FALSE;
}
GST_DEBUG (GST_CAT_COTHREADS,
"Got new cothread stack from %p to %p (size %ld)\n",
*stack, *stack + STACK_SIZE - 1, (long) STACK_SIZE);
*stacksize = STACK_SIZE;
return TRUE;
}
/**
* cothread_switch:
* @thread: cothread state to switch to

1
gst/cothreads.h
View file

@ -81,6 +81,7 @@ void cothread_setfunc (cothread_state *thread, cothread_func func,
void cothread_stop (cothread_state *thread);
void cothread_switch (cothread_state *thread);
gboolean cothread_stackquery (void **stack, glong* stacksize);
void cothread_set_private (cothread_state *thread,
gpointer data);
gpointer cothread_get_private (cothread_state *thread);

2
gst/schedulers/cothreads_compat.h
View file

@ -40,7 +40,7 @@ typedef cothread_state cothread;
*/
#define do_cothreads_init(x) /* NOP */
#define do_cothreads_stackquery(stack,size) FALSE
#define do_cothreads_stackquery(stack,size) cothread_stackquery(stack,size)
#define do_cothread_switch(to) cothread_switch(to)