From 667883b043ec7c3a2eb983d65a38f863f9a39fbd Mon Sep 17 00:00:00 2001
From: Artur Bergman <sky@nanisky.com>
Date: Fri, 17 Aug 2001 12:28:41 +0000
Subject: [PATCH] Protext sharedsv_space better. Extended EDIT and RELEASE
 macro

p4raw-id: //depot/perl@11707
---
 sharedsv.c |  8 ++++----
 sharedsv.h | 11 +++++++++--
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/sharedsv.c b/sharedsv.c
index 4359694..1703257 100644
--- a/sharedsv.c
+++ b/sharedsv.c
@@ -21,6 +21,7 @@
 #include "perl.h"
 
 PerlInterpreter* sharedsv_space;
+perl_mutex sharedsv_space_mutex;
 
 #ifdef USE_ITHREADS
 
@@ -45,6 +46,7 @@ void
 Perl_sharedsv_init(pTHX)
 {
     sharedsv_space = PERL_GET_CONTEXT;
+    MUTEX_INIT(&sharedsv_space_mutex);
 }
 
 /*
@@ -145,9 +147,9 @@ Increments the threadcount of a sharedsv.
 void
 Perl_sharedsv_thrcnt_inc(pTHX_ shared_sv* ssv)
 {
-  SHAREDSvLOCK(ssv);
+  SHAREDSvEDIT(ssv);
   SvREFCNT_inc(ssv->sv);
-  SHAREDSvUNLOCK(ssv);
+  SHAREDSvRELEASE(ssv);
 }
 
 /*
@@ -163,7 +165,6 @@ void
 Perl_sharedsv_thrcnt_dec(pTHX_ shared_sv* ssv)
 {
     SV* sv;
-    SHAREDSvLOCK(ssv);
     SHAREDSvEDIT(ssv);
     sv = SHAREDSvGET(ssv);
     if (SvREFCNT(sv) == 1) {
@@ -195,7 +196,6 @@ Perl_sharedsv_thrcnt_dec(pTHX_ shared_sv* ssv)
     }
     SvREFCNT_dec(sv);
     SHAREDSvRELEASE(ssv);
-    SHAREDSvUNLOCK(ssv);
 }
 
 #endif
diff --git a/sharedsv.h b/sharedsv.h
index 16bba11..1dec854 100644
--- a/sharedsv.h
+++ b/sharedsv.h
@@ -10,6 +10,7 @@ typedef struct {
 } shared_sv;
 
 extern PerlInterpreter* sharedsv_space;
+extern perl_mutex  sharedsv_space_mutex;
 
 void Perl_sharedsv_unlock_scope(pTHX_ shared_sv* ssv);
 void Perl_sharedsv_unlock(pTHX_ shared_sv* ssv);
@@ -22,8 +23,14 @@ void Perl_sharedsv_thrcnt_dec(pTHX_ shared_sv* ssv);
 
 
 #define SHAREDSvGET(a)     (a->sv)
-#define SHAREDSvEDIT(a)    PERL_SET_CONTEXT(sharedsv_space)
-#define SHAREDSvRELEASE(a) PERL_SET_CONTEXT(my_perl)
+#define SHAREDSvEDIT(a)    { MUTEX_LOCK(&sharedsv_space_mutex);\
+SHAREDSvLOCK((a));\
+PERL_SET_CONTEXT(sharedsv_space);\
+}
+#define SHAREDSvRELEASE(a) { PERL_SET_CONTEXT((a)->owner);\
+SHAREDSvUNLOCK((a));\
+MUTEX_UNLOCK(&sharedsv_space_mutex);\
+}
 #define SHAREDSvLOCK(a)    Perl_sharedsv_lock(aTHX_ a)
 #define SHAREDSvUNLOCK(a)  Perl_sharedsv_unlock(aTHX_ a)
 
-- 
2.7.4