Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / libguile / async.h

diff --git a/guile18/libguile/async.h b/guile18/libguile/async.h
new file mode 100644 (file)
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+++ b/guile18/libguile/async.h
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+/* classes: h_files */
+
+#ifndef SCM_ASYNC_H
+#define SCM_ASYNC_H
+
+/* Copyright (C) 1995,1996,1997,1998,2000,2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+\f
+
+#include "libguile/__scm.h"
+#include "libguile/root.h"
+#include "libguile/threads.h"
+
+\f
+
+#define scm_mask_ints (SCM_I_CURRENT_THREAD->block_asyncs != 0)
+
+\f
+
+SCM_API void scm_async_click (void);
+SCM_API void scm_switch (void);
+SCM_API SCM scm_async (SCM thunk);
+SCM_API SCM scm_async_mark (SCM a);
+SCM_API SCM scm_system_async_mark (SCM a);
+SCM_API SCM scm_system_async_mark_for_thread (SCM a, SCM thread);
+SCM_API void scm_i_queue_async_cell (SCM cell, scm_i_thread *);
+SCM_API int scm_i_setup_sleep (scm_i_thread *,
+                              SCM obj, scm_i_pthread_mutex_t *m, int fd);
+SCM_API void scm_i_reset_sleep (scm_i_thread *);
+SCM_API SCM scm_run_asyncs (SCM list_of_a);
+SCM_API SCM scm_noop (SCM args);
+SCM_API SCM scm_call_with_blocked_asyncs (SCM proc);
+SCM_API SCM scm_call_with_unblocked_asyncs (SCM proc);
+void *scm_c_call_with_blocked_asyncs (void *(*p) (void *d), void *d);
+void *scm_c_call_with_unblocked_asyncs (void *(*p) (void *d), void *d);
+void scm_dynwind_block_asyncs (void);
+void scm_dynwind_unblock_asyncs (void);
+
+/* Critical sections */
+
+/* XXX - every critical section needs to be examined whether the
+   requirements for SCM_CRITICAL_SECTION_START/END are fulfilled.  See
+   the manual.
+*/
+
+/* Defined in threads.c. */
+extern scm_i_pthread_mutex_t scm_i_critical_section_mutex;
+
+#define SCM_CRITICAL_SECTION_START \
+  do { \
+    scm_i_pthread_mutex_lock (&scm_i_critical_section_mutex);\
+    SCM_I_CURRENT_THREAD->block_asyncs++; \
+    SCM_I_CURRENT_THREAD->critical_section_level++; \
+  } while (0)
+#define SCM_CRITICAL_SECTION_END \
+  do { \
+    SCM_I_CURRENT_THREAD->critical_section_level--; \
+    SCM_I_CURRENT_THREAD->block_asyncs--; \
+    scm_i_pthread_mutex_unlock (&scm_i_critical_section_mutex); \
+    scm_async_click ();        \
+  } while (0)
+
+SCM_API void scm_init_async (void);
+
+#if (SCM_ENABLE_DEPRECATED == 1)
+
+SCM_API SCM scm_system_async (SCM thunk);
+SCM_API SCM scm_unmask_signals (void);
+SCM_API SCM scm_mask_signals (void);
+
+#endif
+
+#endif  /* SCM_ASYNC_H */
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/