deps/gc/include/gc_pthread_redirects.h

   1 /* Our pthread support normally needs to intercept a number of thread   */
   2 /* calls.  We arrange to do that here, if appropriate.                  */
   3
   4 #ifndef GC_PTHREAD_REDIRECTS_H
   5
   6 #define GC_PTHREAD_REDIRECTS_H
   7
   8 #if !defined(GC_USE_LD_WRAP) && defined(GC_PTHREADS)
   9 /* We need to intercept calls to many of the threads primitives, so      */
  10 /* that we can locate thread stacks and stop the world.                  */
  11 /* Note also that the collector cannot always see thread specific data.  */
  12 /* Thread specific data should generally consist of pointers to          */
  13 /* uncollectable objects (allocated with GC_malloc_uncollectable,        */
  14 /* not the system malloc), which are deallocated using the destructor    */
  15 /* facility in thr_keycreate.  Alternatively, keep a redundant pointer   */
  16 /* to thread specific data on the thread stack.                          */
  17
  18 # include <pthread.h>
  19 # include <signal.h>
  20
  21   int GC_pthread_create(pthread_t *new_thread,
  22                         const pthread_attr_t *attr,
  23                         void *(*start_routine)(void *), void *arg);
  24 #ifndef GC_DARWIN_THREADS
  25   int GC_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset);
  26 #endif
  27   int GC_pthread_join(pthread_t thread, void **retval);
  28   int GC_pthread_detach(pthread_t thread);
  29
  30 #if defined(GC_OSF1_THREADS) \
  31     && defined(_PTHREAD_USE_MANGLED_NAMES_) && !defined(_PTHREAD_USE_PTDNAM_)
  32 /* Unless the compiler supports #pragma extern_prefix, the Tru64 UNIX
  33    <pthread.h> redefines some POSIX thread functions to use mangled names.
  34    If so, undef them before redefining. */
  35 # undef pthread_create
  36 # undef pthread_join
  37 # undef pthread_detach
  38 #endif
  39
  40 # define pthread_create GC_pthread_create
  41 # define pthread_join GC_pthread_join
  42 # define pthread_detach GC_pthread_detach
  43
  44 #ifndef GC_DARWIN_THREADS
  45 # ifdef pthread_sigmask
  46 #  undef pthread_sigmask
  47 # endif  /* pthread_sigmask */
  48 # define pthread_sigmask GC_pthread_sigmask
  49 # define dlopen GC_dlopen
  50 #endif
  51
  52 #endif /* GC_xxxxx_THREADS */
  53
  54 #endif /* GC_PTHREAD_REDIRECTS_H */