File 0200-2192023-Fix-nsHt-deadlock.patch of Package sblim-sfcb

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File 0200-2192023-Fix-nsHt-deadlock.patch of Package sblim-sfcb

From d67f071cb4ce08bcfaf2dcd1b267e40929f816cd Mon Sep 17 00:00:00 2001
From: =?utf-8?q?Klaus=20K=C3=A4mpf?= <kkaempf@suse.de>
Date: Fri, 24 Oct 2008 15:56:51 +0200
Subject: [PATCH] Fix nsHt deadlock

The global namespace hash table must only be created once.
On fast multi-core systems, a simple 'if (nsHt != NULL)' is not
sufficient since another thread might still be filling nsHt.
---
 classProviderGz.c |   21 +++++++++++++++++----
 1 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/classProviderGz.c b/classProviderGz.c
index 10b88e9..07748c7 100644
--- a/classProviderGz.c
+++ b/classProviderGz.c
@@ -124,6 +124,7 @@ typedef struct nameSpaces {
 } NameSpaces;
 
 static UtilHashTable *nsHt=NULL;
+static pthread_once_t nsHt_once = PTHREAD_ONCE_INIT;
 static int nsBaseLen;
 
 static void buildInheritanceTable(ClassRegister * cr)
@@ -402,12 +403,13 @@ static ClassRegister *newClassRegister(char *fname)
       free(buf);
       free(cc);
    }
- 
+#if 0 
    if (cr->vr) {
       mlogf(M_INFO,M_SHOW,"--- Caching ClassProvider for %s (%d.%d-%d) using %ld bytes\n", 
           fin, cr->vr->version, cr->vr->level, cr->vr->objImplLevel, total);
    }
    else mlogf(M_INFO,M_SHOW,"--- Caching ClassProvider for %s (no-version) using %ld bytes\n", fin, total);
+#endif
 
    buildInheritanceTable(cr);
    
@@ -476,6 +478,11 @@ static UtilHashTable *buildClassRegisters()
    return gatherNameSpaces(dn,NULL,1);   
 }    
 
+static void nsHt_init()
+{
+  nsHt=buildClassRegisters();
+}
+
 
 static ClassRegister *getNsReg(const CMPIObjectPath *ref, int *rc)
 {
@@ -483,9 +490,15 @@ static ClassRegister *getNsReg(const CMPIObjectPath *ref, int *rc)
    CMPIString *nsi=CMGetNameSpace(ref,NULL);
    ClassRegister *cReg;
    *rc=0;
-   
-   if (nsHt==NULL) nsHt=buildClassRegisters();
-   
+
+   pthread_once(&nsHt_once, nsHt_init);
+
+   if (nsHt==NULL) {
+     mlogf(M_ERROR,M_SHOW,"--- ClassProvider: namespace hash table not initialized\n");
+     *rc = 1;
+     return NULL;
+   }
+
    if (nsi && nsi->hdl) {
       ns=(char*)nsi->hdl;
       if (strcasecmp(ns,"root/pg_interop")==0)
-- 
1.6.0.2

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File 0200-2192023-Fix-nsHt-deadlock.patch of Package sblim-sfcb

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