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Code Issues

Backported fix for CORE-900: Deadlock when attaching simultaneously with services and standard APIs

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This commit is contained in:
alexpeshkoff 2007-02-28 09:26:25 +00:00
parent a3c4fe1f4d
commit 66625457d4
1 changed files with 38 additions and 8 deletions
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46
src/jrd/jrd.cpp
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@ -183,15 +183,45 @@ const SSHORT WAIT_PERIOD = -1;
#ifdef SUPERSERVER
extern SLONG trace_pools;
static REC_MUTX_T databases_rec_mutex;
// BRS. 03/23/2003
// Those empty defines was substituted with #if defined(V4_THREADING) && !defined(SUPERSERVER)
//#define V4_JRD_MUTEX_LOCK(mutx)
//#define V4_JRD_MUTEX_UNLOCK(mutx)
#define JRD_SS_INIT_MUTEX THD_rec_mutex_init (&databases_rec_mutex)
#define JRD_SS_DESTROY_MUTEX THD_rec_mutex_destroy (&databases_rec_mutex)
namespace
{
REC_MUTX_T databases_rec_mutex;
class DatabasesInit
{
public:
static void init()
{
THD_rec_mutex_init(&databases_rec_mutex);
}
static void cleanup()
{
THD_rec_mutex_destroy(&databases_rec_mutex);
}
};
class DatabasesInitInstance : public Firebird::InitMutex<DatabasesInit>
{
public:
DatabasesInitInstance()
{
init();
}
~DatabasesInitInstance()
{
cleanup();
}
};
DatabasesInitInstance holder;
}
#define JRD_SS_MUTEX_LOCK {THREAD_EXIT();\
THD_rec_mutex_lock (&databases_rec_mutex);\
THREAD_ENTER();}
@ -200,8 +230,6 @@ static REC_MUTX_T databases_rec_mutex;
#define JRD_SS_THD_MUTEX_UNLOCK THD_rec_mutex_unlock (&databases_rec_mutex)
#else
#define JRD_SS_INIT_MUTEX
#define JRD_SS_DESTROY_MUTEX
#define JRD_SS_MUTEX_LOCK
#define JRD_SS_MUTEX_UNLOCK
#define JRD_SS_THD_MUTEX_LOCK
@ -3453,16 +3481,20 @@ ISC_STATUS GDS_SERVICE_ATTACH(ISC_STATUS* user_status,
tdbb->tdbb_status_vector = user_status;
tdbb->tdbb_database = NULL;
JRD_SS_MUTEX_LOCK;
try
{
*svc_handle = SVC_attach(service_length, service_name, spb_length, spb);
}
catch (const std::exception& ex)
{
JRD_SS_MUTEX_UNLOCK;
return error(user_status, ex);
}
JRD_SS_MUTEX_UNLOCK;
return return_success(tdbb);
}
@ -4819,7 +4851,6 @@ static void cleanup(void* arg)
#if defined(V4_THREADING) && !defined(SUPERSERVER)
V4_MUTEX_DESTROY(databases_mutex);
#endif
JRD_SS_DESTROY_MUTEX;
initialized = false;
databases = NULL;
}
@ -5526,7 +5557,6 @@ static Database* init(thread_db* tdbb,
#if defined(V4_THREADING) && !defined(SUPERSERVER)
V4_MUTEX_INIT(databases_mutex);
#endif
JRD_SS_INIT_MUTEX;
gds__register_cleanup(cleanup, 0);
initialized = true;
JRD_cache_default = Config::getDefaultDbCachePages();