1 /* classes: h_files */ 2 3 #ifndef SCM_ASYNC_H 4 #define SCM_ASYNC_H 5 6 /* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc. 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with this library; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23 24 25 #include "libguile/__scm.h" 26 #include "libguile/root.h" 27 #include "libguile/threads.h" 28 29 30 31 #define scm_mask_ints (SCM_I_CURRENT_THREAD->block_asyncs != 0) 32 33 34 35 SCM_API void scm_async_click (void); 36 SCM_API void scm_switch (void); 37 SCM_API SCM scm_async (SCM thunk); 38 SCM_API SCM scm_async_mark (SCM a); 39 SCM_API SCM scm_system_async_mark (SCM a); 40 SCM_API SCM scm_system_async_mark_for_thread (SCM a, SCM thread); 41 SCM_API void scm_i_queue_async_cell (SCM cell, scm_i_thread *); 42 SCM_API int scm_i_setup_sleep (scm_i_thread *, 43 SCM obj, scm_i_pthread_mutex_t *m, int fd); 44 SCM_API void scm_i_reset_sleep (scm_i_thread *); 45 SCM_API SCM scm_run_asyncs (SCM list_of_a); 46 SCM_API SCM scm_noop (SCM args); 47 SCM_API SCM scm_call_with_blocked_asyncs (SCM proc); 48 SCM_API SCM scm_call_with_unblocked_asyncs (SCM proc); 49 void *scm_c_call_with_blocked_asyncs (void *(*p) (void *d), void *d); 50 void *scm_c_call_with_unblocked_asyncs (void *(*p) (void *d), void *d); 51 void scm_dynwind_block_asyncs (void); 52 void scm_dynwind_unblock_asyncs (void); 53 54 /* Critical sections */ 55 56 /* XXX - every critical section needs to be examined whether the 57 requirements for SCM_CRITICAL_SECTION_START/END are fulfilled. See 58 the manual. 59 */ 60 61 /* Defined in threads.c. */ 62 extern scm_i_pthread_mutex_t scm_i_critical_section_mutex; 63 64 #define SCM_CRITICAL_SECTION_START \ 65 do { \ 66 scm_i_pthread_mutex_lock (&scm_i_critical_section_mutex);\ 67 SCM_I_CURRENT_THREAD->block_asyncs++; \ 68 SCM_I_CURRENT_THREAD->critical_section_level++; \ 69 } while (0) 70 #define SCM_CRITICAL_SECTION_END \ 71 do { \ 72 SCM_I_CURRENT_THREAD->critical_section_level--; \ 73 SCM_I_CURRENT_THREAD->block_asyncs--; \ 74 scm_i_pthread_mutex_unlock (&scm_i_critical_section_mutex); \ 75 scm_async_click (); \ 76 } while (0) 77 78 SCM_API void scm_init_async (void); 79 80 #if (SCM_ENABLE_DEPRECATED == 1) 81 82 SCM_API SCM scm_system_async (SCM thunk); 83 SCM_API SCM scm_unmask_signals (void); 84 SCM_API SCM scm_mask_signals (void); 85 86 #endif 87 88 #endif /* SCM_ASYNC_H */ 89 90 /* 91 Local Variables: 92 c-file-style: "gnu" 93 End: 94 */ 95