gecko-dev/gc/boehm/generic_threads.c

77 lines
1.8 KiB
C

/*
generic_threads.c
A module that permits clients of the GC to supply callback functions
for thread stack scanning.
by Patrick C. Beard.
*/
#include "generic_threads.h"
# include "gc_priv.h"
# include "gc_mark.h"
static void mark_range(char* begin, char* end)
{
while (begin < end) {
GC_PUSH_ONE_STACK(*(word*)begin, 0);
begin += ALIGNMENT;
}
}
/*
Until a client installs a stack marking routine, this will mark the
current stack. This is crucial to keep data live during program
startup.
*/
static void default_mark_all_stacks(GC_mark_range_proc marker)
{
#ifdef STACK_GROWS_DOWN
mark_range(GC_approx_sp(), GC_get_stack_base());
#else
mark_range(GC_get_stack_base(), GC_approx_sp());
#endif
}
static void default_proc(void* mutex) {}
GC_generic_mark_all_stacks_proc GC_generic_mark_all_stacks = &default_mark_all_stacks;
void* GC_generic_mutex = NULL;
GC_generic_proc GC_generic_locker = &default_proc;
GC_generic_proc GC_generic_unlocker = &default_proc;
GC_generic_proc GC_generic_stopper = &default_proc;
GC_generic_proc GC_generic_starter = &default_proc;
void GC_generic_init_threads(GC_generic_mark_all_stacks_proc mark_all_stacks,
void* mutex,
GC_generic_proc locker, GC_generic_proc unlocker,
GC_generic_proc stopper, GC_generic_proc starter)
{
GC_generic_mark_all_stacks = mark_all_stacks;
GC_generic_mutex = mutex;
GC_generic_locker = locker;
GC_generic_unlocker = unlocker;
GC_generic_stopper = stopper;
GC_generic_starter = starter;
GC_dont_expand = 1;
// GC_set_max_heap_size(20L * 1024L * 1024L);
}
#ifndef WIN32_THREADS
void GC_push_all_stacks()
{
GC_generic_mark_all_stacks(&mark_range);
}
void GC_stop_world()
{
GC_generic_stopper(GC_generic_mutex);
}
void GC_start_world()
{
GC_generic_starter(GC_generic_mutex);
}
#endif /* WIN32_THREADS */