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