1 /* -----------------------------------------------------------------------------
3 * (c) The GHC Team, 1995-2009
5 * The RTS stores some "global" values on behalf of libraries, so that
6 * some libraries can ensure that certain top-level things are shared
7 * even when multiple versions of the library are loaded. e.g. see
8 * Data.Typeable and GHC.Conc.
10 * ---------------------------------------------------------------------------*/
13 #include "RtsGlobals.h"
15 static StgStablePtr typeableStore = 0;
16 static StgStablePtr signalHandlerStore = 0;
19 Mutex globalStoreLock;
26 signalHandlerStore = 0;
28 initMutex(&globalStoreLock);
36 closeMutex(&globalStoreLock);
38 if(typeableStore!=0) {
39 freeStablePtr((StgStablePtr)typeableStore);
42 if(signalHandlerStore!=0) {
43 freeStablePtr((StgStablePtr)signalHandlerStore);
49 getOrSetTypeableStore(StgStablePtr ptr)
51 StgStablePtr ret = typeableStore;
54 ACQUIRE_LOCK(&globalStoreLock);
58 typeableStore = ret = ptr;
61 RELEASE_LOCK(&globalStoreLock);
68 getOrSetSignalHandlerStore(StgStablePtr ptr)
70 StgStablePtr ret = signalHandlerStore;
73 ACQUIRE_LOCK(&globalStoreLock);
74 ret=signalHandlerStore;
77 signalHandlerStore = ret = ptr;
80 RELEASE_LOCK(&globalStoreLock);