summaryrefslogtreecommitdiff
path: root/libguile/coop-defs.h
diff options
context:
space:
mode:
Diffstat (limited to 'libguile/coop-defs.h')
-rw-r--r--libguile/coop-defs.h149
1 files changed, 149 insertions, 0 deletions
diff --git a/libguile/coop-defs.h b/libguile/coop-defs.h
new file mode 100644
index 000000000..d9a6b9eec
--- /dev/null
+++ b/libguile/coop-defs.h
@@ -0,0 +1,149 @@
+/* classes: h_files */
+
+#ifndef COOP_DEFSH
+#define COOP_DEFSH
+
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ */
+
+
+# ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+# else
+# ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# ifdef HAVE_TIME_H
+# include <time.h>
+# endif
+# endif
+# endif
+
+/* This file is included by threads.h, which, in turn, is included by
+ libguile.h while coop-threads.h only is included by
+ coop-threads.c. */
+
+/* The coop_t struct must be declared here, since macros in this file
+ refer to the data member. */
+
+/* The notion of a thread is merged with the notion of a queue.
+ Thread stuff: thread status (sp) and stuff to use during
+ (re)initialization. Queue stuff: next thread in the queue
+ (next). */
+
+struct qt_t;
+
+typedef struct coop_t {
+ struct qt_t *sp; /* QuickThreads handle. */
+ void *sto; /* `malloc'-allocated stack. */
+
+ struct coop_t *next; /* Next thread in the queue. */
+
+ struct coop_t *all_next;
+ struct coop_t *all_prev;
+
+ void *data; /* Thread local data */
+
+ void *base; /* Base of stack */
+ void *top; /* Top of stack */
+
+ void *joining; /* A queue of threads waiting to join this
+ thread */
+
+ time_t wakeup_time; /* Time to stop sleeping */
+
+} coop_t;
+
+extern coop_t *coop_global_curr; /* Currently-executing thread. */
+
+extern void coop_yield (void);
+
+extern size_t scm_switch_counter;
+extern size_t scm_thread_count;
+
+
+
+/* Cooperative threads don't need to have these defined */
+
+#define SCM_THREAD_CRITICAL_SECTION_START
+#define SCM_THREAD_CRITICAL_SECTION_END
+
+
+
+#define SCM_NO_CRITICAL_SECTION_OWNER 0
+#define SCM_THREAD_SWITCH_COUNT 50 /* was 10 /mdj */
+
+
+
+#define SCM_THREAD_DEFER
+#define SCM_THREAD_ALLOW
+#define SCM_THREAD_REDEFER
+#define SCM_THREAD_REALLOW_1
+#define SCM_THREAD_REALLOW_2
+
+#if 0
+#define SCM_THREAD_SWITCHING_CODE \
+{ \
+ if (scm_thread_count > 1) \
+ coop_yield(); \
+} \
+
+#else
+#define SCM_THREAD_SWITCHING_CODE \
+{ \
+ if (scm_thread_count > 1) \
+ { \
+ scm_switch_counter--; \
+ if (scm_switch_counter == 0) \
+ { \
+ scm_switch_counter = SCM_THREAD_SWITCH_COUNT; \
+ coop_yield(); \
+ } \
+ } \
+} \
+
+#endif
+
+#define SCM_THREAD_LOCAL_DATA (coop_global_curr->data)
+#define SCM_SET_THREAD_LOCAL_DATA(ptr) (coop_global_curr->data = (ptr))
+
+#endif /* COOP_DEFSH */