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#ifndef GC_PTHREAD_SUPPORT_H
#define GC_PTHREAD_SUPPORT_H
# include "private/gc_priv.h"
# if defined(GC_PTHREADS) && !defined(GC_SOLARIS_THREADS) \
&& !defined(GC_WIN32_THREADS)
#if defined(GC_DARWIN_THREADS)
# include "private/darwin_stop_world.h"
#else
# include "private/pthread_stop_world.h"
#endif
/* We use the allocation lock to protect thread-related data structures. */
/* The set of all known threads. We intercept thread creation and */
/* joins. */
/* Protected by allocation/GC lock. */
/* Some of this should be declared volatile, but that's inconsistent */
/* with some library routine declarations. */
typedef struct GC_Thread_Rep {
struct GC_Thread_Rep * next; /* More recently allocated threads */
/* with a given pthread id come */
/* first. (All but the first are */
/* guaranteed to be dead, but we may */
/* not yet have registered the join.) */
pthread_t id;
/* Extra bookkeeping information the stopping code uses */
struct thread_stop_info stop_info;
short flags;
# define FINISHED 1 /* Thread has exited. */
# define DETACHED 2 /* Thread is intended to be detached. */
# define MAIN_THREAD 4 /* True for the original thread only. */
# define SUSPENDED 8 /* True if thread was suspended externally */
short thread_blocked; /* Protected by GC lock. */
/* Treated as a boolean value. If set, */
/* thread will acquire GC lock before */
/* doing any pointer manipulations, and */
/* has set its sp value. Thus it does */
/* not need to be sent a signal to stop */
/* it. */
ptr_t stack_end; /* Cold end of the stack. */
# ifdef IA64
ptr_t backing_store_end;
ptr_t backing_store_ptr;
# endif
void * status; /* The value returned from the thread. */
/* Used only to avoid premature */
/* reclamation of any data it might */
/* reference. */
# ifdef THREAD_LOCAL_ALLOC
# if CPP_WORDSZ == 64 && defined(ALIGN_DOUBLE)
# define GRANULARITY 16
# define NFREELISTS 49
# else
# define GRANULARITY 8
# define NFREELISTS 65
# endif
/* The ith free list corresponds to size i*GRANULARITY */
# define INDEX_FROM_BYTES(n) ((ADD_SLOP(n) + GRANULARITY - 1)/GRANULARITY)
# define BYTES_FROM_INDEX(i) ((i) * GRANULARITY - EXTRA_BYTES)
# define SMALL_ENOUGH(bytes) (ADD_SLOP(bytes) <= \
(NFREELISTS-1)*GRANULARITY)
ptr_t ptrfree_freelists[NFREELISTS];
ptr_t normal_freelists[NFREELISTS];
# ifdef GC_GCJ_SUPPORT
ptr_t gcj_freelists[NFREELISTS];
# endif
/* Free lists contain either a pointer or a small count */
/* reflecting the number of granules allocated at that */
/* size. */
/* 0 ==> thread-local allocation in use, free list */
/* empty. */
/* > 0, <= DIRECT_GRANULES ==> Using global allocation, */
/* too few objects of this size have been */
/* allocated by this thread. */
/* >= HBLKSIZE => pointer to nonempty free list. */
/* > DIRECT_GRANULES, < HBLKSIZE ==> transition to */
/* local alloc, equivalent to 0. */
# define DIRECT_GRANULES (HBLKSIZE/GRANULARITY)
/* Don't use local free lists for up to this much */
/* allocation. */
# endif
} * GC_thread;
# define THREAD_TABLE_SZ 128 /* Must be power of 2 */
extern volatile GC_thread GC_threads[THREAD_TABLE_SZ];
extern GC_bool GC_thr_initialized;
GC_thread GC_lookup_thread(pthread_t id);
void GC_stop_init();
extern GC_bool GC_in_thread_creation;
/* We may currently be in thread creation or destruction. */
/* Only set to TRUE while allocation lock is held. */
/* When set, it is OK to run GC from unknown thread. */
#endif /* GC_PTHREADS && !GC_SOLARIS_THREADS.... etc */
#endif /* GC_PTHREAD_SUPPORT_H */
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