* eval_intern.h, yarvcore.h: remove unused macro definition.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@11654 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Wed Feb  7 22:33:58 2007  Koichi Sasada  <ko1@atdot.net>
+
+	* eval_intern.h, yarvcore.h: remove unused macro definition.
+
 Wed Feb  7 22:30:28 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* eval.c: fixed to use ANSI function style.

eval_intern.h

@@ -90,67 +90,6 @@ char *strrchr _((const char *, const char));
 #include "vmsruby_private.h"
 #endif
 
-#ifdef USE_CONTEXT
-
-NORETURN(static void rb_jump_context(rb_jmpbuf_t, int));
-static inline void
-rb_jump_context(rb_jmpbuf_t env, int val)
-{
-    env->status = val;
-    setcontext(&env->context);
-    abort();			/* ensure noreturn */
-}
-
-/*
- * FUNCTION_CALL_MAY_RETURN_TWICE is a magic for getcontext, gcc,
- * IA64 register stack and SPARC register window combination problem.
- *
- * Assume following code sequence.
- * 
- * 1. set a register in the register stack/window such as r32/l0.
- * 2. call getcontext.
- * 3. use the register.
- * 4. update the register for other use.
- * 5. call setcontext indirectly (or directly).
- *
- * This code should be run as 1->2->3->4->5->3->4.
- * But after second getcontext return (second 3),
- * the register is broken (updated).
- * It's because getcontext/setcontext doesn't preserve the content of the
- * register stack/window.
- *
- * setjmp also doesn't preserve the content of the register stack/window.
- * But it has not the problem because gcc knows setjmp may return twice.
- * gcc detects setjmp and generates setjmp safe code.
- *
- * So setjmp call before getcontext call makes the code somewhat safe.
- * It fix the problem on IA64.
- * It is not required that setjmp is called at run time, since the problem is
- * register usage.
- *
- * Since the magic setjmp is not enough for SPARC,
- * inline asm is used to prohibit registers in register windows.
- */
-#if defined (__GNUC__) && (defined(sparc) || defined(__sparc__))
-#define FUNCTION_CALL_MAY_RETURN_TWICE \
- ({ __asm__ volatile ("" : : :  \
-    "%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%o7", \
-    "%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", "%l7", \
-    "%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%i7"); })
-#else
-extern jmp_buf function_call_may_return_twice_jmp_buf;
-extern int function_call_may_return_twice_false;
-#define FUNCTION_CALL_MAY_RETURN_TWICE \
-  (function_call_may_return_twice_false ? \
-   setjmp(function_call_may_return_twice_jmp_buf) : \
-   0)
-#endif
-#define ruby_longjmp(env, val) rb_jump_context(env, val)
-#define ruby_setjmp(j) ((j)->status = 0, \
-    FUNCTION_CALL_MAY_RETURN_TWICE, \
-    getcontext(&(j)->context), \
-    (j)->status)
-#else
 #if !defined(setjmp) && defined(HAVE__SETJMP)
 #define ruby_setjmp(env) _setjmp(env)
 #define ruby_longjmp(env,val) _longjmp(env,val)
@@ -158,7 +97,6 @@ extern int function_call_may_return_twice_false;
 #define ruby_setjmp(env) setjmp(env)
 #define ruby_longjmp(env,val) longjmp(env,val)
 #endif
-#endif
 
 #include <sys/types.h>
 #include <signal.h>

yarvcore.h

@@ -17,10 +17,6 @@
 
 #include <setjmp.h>
 
-#if 0 && defined(HAVE_GETCONTEXT) && defined(HAVE_SETCONTEXT)
-#include <ucontext.h>
-#define USE_CONTEXT
-#endif
 #include "ruby.h"
 #include "st.h"
 #include "node.h"
@@ -371,14 +367,7 @@ enum rb_thread_status {
     THREAD_KILLED,
 };
 
-#ifdef USE_CONTEXT
-typedef struct {
-    ucontext_t context;
-    volatile int status;
-} rb_jmpbuf_t[1];
-#else
 typedef jmp_buf rb_jmpbuf_t;
-#endif
 
 struct rb_vm_tag {
     rb_jmpbuf_t buf;