* rubysig.h (TRAP_END): preserve errno before switching context.

  [ruby-core:02137]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5366 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 3 deletions

diff --git a/rubysig.h b/rubysig.h
index 6be634787d..5b8ea45863 100644
--- a/rubysig.h
+++ b/rubysig.h
@@ -23,10 +23,13 @@ typedef LONG rb_atomic_t;
 
 /* Windows doesn't allow interrupt while system calls */
 # define TRAP_BEG do {\
+    extern int errno;\
     rb_atomic_t trap_immediate = ATOMIC_SET(rb_trap_immediate, 1)
 # define TRAP_END\
-	ATOMIC_SET(rb_trap_immediate, trap_immediate);\
-	CHECK_INTS;\
+    ATOMIC_SET(rb_trap_immediate, trap_immediate);\
+    saved_errno = errno;\
+    CHECK_INTS;\
+    errno = saved_errno;\
 } while (0)
 # define RUBY_CRITICAL(statements) do {\
     rb_w32_enter_critical();\
@@ -42,10 +45,14 @@ typedef int rb_atomic_t;
 # define ATOMIC_DEC(var) (--(var))
 
 # define TRAP_BEG do {\
+    extern int errno;\
+    int saved_errno = 0;\
     int trap_immediate = rb_trap_immediate;\
     rb_trap_immediate = 1
 # define TRAP_END rb_trap_immediate = trap_immediate;\
-  CHECK_INTS;\
+    saved_errno = errno;\
+    CHECK_INTS;\
+    errno = saved_errno;\
 } while (0)
 
 # define RUBY_CRITICAL(statements) do {\