X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-arch.h;h=582bfc7e016b668ee47b33285b5eecea099e36b9;hb=bf40ae88bc289fd765a33861cc4bc0853ed483ba;hp=bbcdcc93126de45fae16fa044f36902c94b9b066;hpb=68fd2d2dd6f265669a8957accd8a33e62786a97e;p=sbcl.git

diff --git a/src/runtime/x86-arch.h b/src/runtime/x86-arch.h
index bbcdcc9..582bfc7 100644
--- a/src/runtime/x86-arch.h
+++ b/src/runtime/x86-arch.h
@@ -5,6 +5,12 @@
 #ifndef _X86_ARCH_H
 #define _X86_ARCH_H
 
+#ifndef SBCL_GENESIS_CONFIG
+#error genesis/config.h (or sbcl.h) must be included before this file
+#endif
+
+#include "interr.h"                     /* for declaration of lose() */
+
 #define ARCH_HAS_STACK_POINTER
 
 /* FIXME: Do we also want
@@ -12,4 +18,79 @@
  * here? (The answer wasn't obvious to me when merging the
  * architecture-abstracting patches for CSR's SPARC port. -- WHN 2002-02-15) */
 
+#define COMPILER_BARRIER \
+    do { __asm__ __volatile__ ( "" : : : "memory"); } while (0)
+
+#ifdef LISP_FEATURE_WIN32
+extern int os_number_of_processors;
+#define yield_on_uniprocessor()                 \
+    do { if (os_number_of_processors<=1) SwitchToThread(); } while(0)
+#else
+/* Stubs are better than ifdef EVERYWHERE. */
+#define yield_on_uniprocessor()                 \
+    do {} while(0)
+#endif
+
+
+static inline void
+get_spinlock(volatile lispobj *word, unsigned long value)
+{
+#ifdef LISP_FEATURE_SB_THREAD
+    u32 eax=0;
+    if(*word==value)
+        lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
+    do {
+#if defined(LISP_FEATURE_DARWIN)
+        asm volatile ("xor %0,%0;\n\
+              lock/cmpxchg %1,%2"
+             : "=a" (eax)
+             : "r" (value), "m" (*word)
+             : "memory", "cc");
+#else
+        if (eax!=0) {
+            asm volatile("rep; nop");
+        }
+        asm volatile ("xor %0,%0\n\
+              lock cmpxchg %1,%2"
+             : "=a" (eax)
+             : "r" (value), "m" (*word)
+             : "memory", "cc");
+#endif
+        yield_on_uniprocessor();
+    } while(eax!=0);
+#else
+    *word=value;
+#endif
+}
+
+static inline void
+release_spinlock(volatile lispobj *word)
+{
+    /* See comment in RELEASE-SPINLOCK in target-thread.lisp. */
+    COMPILER_BARRIER;
+    *word=0;
+    COMPILER_BARRIER;
+}
+
+static inline lispobj
+swap_lispobjs(volatile lispobj *dest, lispobj value)
+{
+    lispobj old_value;
+#if defined(LISP_FEATURE_DARWIN)
+    asm volatile ("lock/xchg %0,(%1)"
+         : "=r" (old_value)
+         : "r" (dest), "0" (value)
+         : "memory");
+#else
+    asm volatile ("lock xchg %0,(%1)"
+         : "=r" (old_value)
+         : "r" (dest), "0" (value)
+         : "memory");
+#endif
+    return old_value;
+}
+
+extern void fast_bzero_detect(void *, size_t);
+extern void (*fast_bzero_pointer)(void *, size_t);
+
 #endif /* _X86_ARCH_H */