0.9.2.42:

[sbcl.git] / src / runtime / x86-arch.h

diff --git a/src/runtime/x86-arch.h b/src/runtime/x86-arch.h
index bbcdcc9..6c7802a 100644 (file)
--- a/src/runtime/x86-arch.h
+++ b/src/runtime/x86-arch.h
@@ -5,6 +5,10 @@
 #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
+
 #define ARCH_HAS_STACK_POINTER
 
 /* FIXME: Do we also want
@@ -12,4 +16,31 @@
  * here? (The answer wasn't obvious to me when merging the
  * architecture-abstracting patches for CSR's SPARC port. -- WHN 2002-02-15) */
 
+extern never_returns lose(char *fmt, ...);
+
+static inline void
+get_spinlock(volatile lispobj *word,long value)
+{
+#ifdef LISP_FEATURE_SB_THREAD
+    u32 eax=0;
+    if(*word==value)
+        lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
+    do {
+        asm ("xor %0,%0\n\
+              lock cmpxchg %1,%2"
+             : "=a" (eax)
+             : "r" (value), "m" (*word)
+             : "memory", "cc");
+    } while(eax!=0);
+#else
+    *word=value;
+#endif
+}
+
+static inline void
+release_spinlock(volatile lispobj *word)
+{
+    *word=0;
+}
+
 #endif /* _X86_ARCH_H */