X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=hs-boehmgc.git;a=blobdiff_plain;f=gc-7.2%2Flibatomic_ops%2Fsrc%2Fatomic_ops%2Fsysdeps%2Fgeneric_pthread.h;fp=gc-7.2%2Flibatomic_ops%2Fsrc%2Fatomic_ops%2Fsysdeps%2Fgeneric_pthread.h;h=55a1967b9b9d54844a3ed6cb525e5917f674d410;hp=0000000000000000000000000000000000000000;hb=324587ba93dc77f37406d41fd2a20d0e0d94fb1d;hpb=2a4ea609491b225a1ceb06da70396e93916f137a

diff --git a/gc-7.2/libatomic_ops/src/atomic_ops/sysdeps/generic_pthread.h b/gc-7.2/libatomic_ops/src/atomic_ops/sysdeps/generic_pthread.h
new file mode 100644
index 0000000..55a1967
--- /dev/null
+++ b/gc-7.2/libatomic_ops/src/atomic_ops/sysdeps/generic_pthread.h
@@ -0,0 +1,269 @@
+/*
+ * Copyright (c) 2003 by Hewlett-Packard Company.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/* The following is useful primarily for debugging and documentation.   */
+/* We define various atomic operations by acquiring a global pthread    */
+/* lock.  The resulting implementation will perform poorly, but should  */
+/* be correct unless it is used from signal handlers.                   */
+/* We assume that all pthread operations act like full memory barriers. */
+/* (We believe that is the intent of the specification.)                */
+
+#include <pthread.h>
+
+#include "test_and_set_t_is_ao_t.h"
+        /* This is not necessarily compatible with the native           */
+        /* implementation.  But those can't be safely mixed anyway.     */
+
+/* We define only the full barrier variants, and count on the           */
+/* generalization section below to fill in the rest.                    */
+extern pthread_mutex_t AO_pt_lock;
+
+AO_INLINE void
+AO_nop_full(void)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  pthread_mutex_unlock(&AO_pt_lock);
+}
+#define AO_HAVE_nop_full
+
+AO_INLINE AO_t
+AO_load_full(const volatile AO_t *addr)
+{
+  AO_t result;
+  pthread_mutex_lock(&AO_pt_lock);
+  result = *addr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return result;
+}
+#define AO_HAVE_load_full
+
+AO_INLINE void
+AO_store_full(volatile AO_t *addr, AO_t val)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  *addr = val;
+  pthread_mutex_unlock(&AO_pt_lock);
+}
+#define AO_HAVE_store_full
+
+AO_INLINE unsigned char
+AO_char_load_full(const volatile unsigned char *addr)
+{
+  unsigned char result;
+  pthread_mutex_lock(&AO_pt_lock);
+  result = *addr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return result;
+}
+#define AO_HAVE_char_load_full
+
+AO_INLINE void
+AO_char_store_full(volatile unsigned char *addr, unsigned char val)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  *addr = val;
+  pthread_mutex_unlock(&AO_pt_lock);
+}
+#define AO_HAVE_char_store_full
+
+AO_INLINE unsigned short
+AO_short_load_full(const volatile unsigned short *addr)
+{
+  unsigned short result;
+  pthread_mutex_lock(&AO_pt_lock);
+  result = *addr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return result;
+}
+#define AO_HAVE_short_load_full
+
+AO_INLINE void
+AO_short_store_full(volatile unsigned short *addr, unsigned short val)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  *addr = val;
+  pthread_mutex_unlock(&AO_pt_lock);
+}
+#define AO_HAVE_short_store_full
+
+AO_INLINE unsigned int
+AO_int_load_full(const volatile unsigned int *addr)
+{
+  unsigned int result;
+  pthread_mutex_lock(&AO_pt_lock);
+  result = *addr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return result;
+}
+#define AO_HAVE_int_load_full
+
+AO_INLINE void
+AO_int_store_full(volatile unsigned int *addr, unsigned int val)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  *addr = val;
+  pthread_mutex_unlock(&AO_pt_lock);
+}
+#define AO_HAVE_int_store_full
+
+AO_INLINE AO_TS_VAL_t
+AO_test_and_set_full(volatile AO_TS_t *addr)
+{
+  AO_TS_VAL_t result;
+  pthread_mutex_lock(&AO_pt_lock);
+  result = (AO_TS_VAL_t)(*addr);
+  *addr = AO_TS_SET;
+  pthread_mutex_unlock(&AO_pt_lock);
+  assert(result == AO_TS_SET || result == AO_TS_CLEAR);
+  return result;
+}
+#define AO_HAVE_test_and_set_full
+
+AO_INLINE AO_t
+AO_fetch_and_add_full(volatile AO_t *p, AO_t incr)
+{
+  AO_t tmp;
+
+  pthread_mutex_lock(&AO_pt_lock);
+  tmp = *p;
+  *p = tmp + incr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return tmp;
+}
+#define AO_HAVE_fetch_and_add_full
+
+AO_INLINE unsigned char
+AO_char_fetch_and_add_full(volatile unsigned char *p, unsigned char incr)
+{
+  unsigned char tmp;
+
+  pthread_mutex_lock(&AO_pt_lock);
+  tmp = *p;
+  *p = tmp + incr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return tmp;
+}
+#define AO_HAVE_char_fetch_and_add_full
+
+AO_INLINE unsigned short
+AO_short_fetch_and_add_full(volatile unsigned short *p, unsigned short incr)
+{
+  unsigned short tmp;
+
+  pthread_mutex_lock(&AO_pt_lock);
+  tmp = *p;
+  *p = tmp + incr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return tmp;
+}
+#define AO_HAVE_short_fetch_and_add_full
+
+AO_INLINE unsigned int
+AO_int_fetch_and_add_full(volatile unsigned int *p, unsigned int incr)
+{
+  unsigned int tmp;
+
+  pthread_mutex_lock(&AO_pt_lock);
+  tmp = *p;
+  *p = tmp + incr;
+  pthread_mutex_unlock(&AO_pt_lock);
+  return tmp;
+}
+#define AO_HAVE_int_fetch_and_add_full
+
+AO_INLINE void
+AO_or_full(volatile AO_t *p, AO_t incr)
+{
+  AO_t tmp;
+
+  pthread_mutex_lock(&AO_pt_lock);
+  tmp = *p;
+  *p = (tmp | incr);
+  pthread_mutex_unlock(&AO_pt_lock);
+}
+#define AO_HAVE_or_full
+
+AO_INLINE int
+AO_compare_and_swap_full(volatile AO_t *addr,
+                             AO_t old, AO_t new_val)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  if (*addr == old)
+    {
+      *addr = new_val;
+      pthread_mutex_unlock(&AO_pt_lock);
+      return 1;
+    }
+  else
+    pthread_mutex_unlock(&AO_pt_lock);
+    return 0;
+}
+#define AO_HAVE_compare_and_swap_full
+
+/* Unlike real architectures, we define both double-width CAS variants. */
+
+typedef struct {
+        AO_t AO_val1;
+        AO_t AO_val2;
+} AO_double_t;
+#define AO_HAVE_double_t
+
+AO_INLINE int
+AO_compare_double_and_swap_double_full(volatile AO_double_t *addr,
+                                       AO_t old1, AO_t old2,
+                                       AO_t new1, AO_t new2)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  if (addr -> AO_val1 == old1 && addr -> AO_val2 == old2)
+    {
+      addr -> AO_val1 = new1;
+      addr -> AO_val2 = new2;
+      pthread_mutex_unlock(&AO_pt_lock);
+      return 1;
+    }
+  else
+    pthread_mutex_unlock(&AO_pt_lock);
+    return 0;
+}
+#define AO_HAVE_compare_double_and_swap_double_full
+
+AO_INLINE int
+AO_compare_and_swap_double_full(volatile AO_double_t *addr,
+                                AO_t old1,
+                                AO_t new1, AO_t new2)
+{
+  pthread_mutex_lock(&AO_pt_lock);
+  if (addr -> AO_val1 == old1)
+    {
+      addr -> AO_val1 = new1;
+      addr -> AO_val2 = new2;
+      pthread_mutex_unlock(&AO_pt_lock);
+      return 1;
+    }
+  else
+    pthread_mutex_unlock(&AO_pt_lock);
+    return 0;
+}
+#define AO_HAVE_compare_and_swap_double_full
+
+/* We can't use hardware loads and stores, since they don't     */
+/* interact correctly with atomic updates.                      */