X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-arch.h;h=19d6cf6aa446ba74d8b0aab5b355f756cc88af5d;hb=dcf5978d9d33098e868ae6eea28e1b310038c03d;hp=bbcdcc93126de45fae16fa044f36902c94b9b066;hpb=68fd2d2dd6f265669a8957accd8a33e62786a97e;p=sbcl.git

diff --git a/src/runtime/x86-arch.h b/src/runtime/x86-arch.h
index bbcdcc9..19d6cf6 100644
--- a/src/runtime/x86-arch.h
+++ b/src/runtime/x86-arch.h
@@ -12,4 +12,23 @@
  * here? (The answer wasn't obvious to me when merging the
  * architecture-abstracting patches for CSR's SPARC port. -- WHN 2002-02-15) */
 
+static inline void 
+get_spinlock(lispobj *word,int value)
+{
+    u32 eax=0;
+    do {
+	asm ("xor %0,%0\n\
+              lock cmpxchg %1,%2" 
+	     : "=a" (eax)
+	     : "r" (value), "m" (*word)
+	     : "memory", "cc");
+    } while(eax!=0);
+}
+
+static inline void
+release_spinlock(lispobj *word)
+{
+    *word=0;
+}
+
 #endif /* _X86_ARCH_H */