ITS#7251 fix Apple/Windows shared mutex naming

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 6633f92..bb8de1a 100644 (file)
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -2656,13 +2656,14 @@ typedef unsigned long long      mdb_hash_t;
  *      hval arg on the first call.
  */
 static mdb_hash_t
-mdb_hash_str(char *str, mdb_hash_t hval)
+mdb_hash_val(MDB_val *val, mdb_hash_t hval)
 {
-       unsigned char *s = (unsigned char *)str;        /* unsigned string */
+       unsigned char *s = (unsigned char *)val->mv_data;       /* unsigned string */
+       unsigned char *end = s + val->mv_size;
        /*
         * FNV-1a hash each octet of the string
         */
-       while (*s) {
+       while (s < end) {
                /* xor the bottom with the current octet */
                hval ^= (mdb_hash_t)*s++;
 
@@ -2679,10 +2680,10 @@ mdb_hash_str(char *str, mdb_hash_t hval)
  * @param[out] hexbuf an array of 17 chars to hold the hash
  */
 static void
-mdb_hash_hex(char *str, char *hexbuf)
+mdb_hash_hex(MDB_val *val, char *hexbuf)
 {
        int i;
-       mdb_hash_t h = mdb_hash_str(str, MDB_HASH_INIT);
+       mdb_hash_t h = mdb_hash_val(val, MDB_HASH_INIT);
        for (i=0; i<8; i++) {
                hexbuf += sprintf(hexbuf, "%02x", (unsigned int)h & 0xff);
                h >>= 8;
@@ -2815,7 +2816,15 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
        }
        if (*excl) {
 #ifdef _WIN32
+               BY_HANDLE_FILE_INFORMATION stbuf;
+               struct {
+                       DWORD volume;
+                       DWORD nhigh;
+                       DWORD nlow;
+               } idbuf;
+               MDB_val val;
                char hexbuf[17];
+
                if (!mdb_sec_inited) {
                        InitializeSecurityDescriptor(&mdb_null_sd,
                                SECURITY_DESCRIPTOR_REVISION);
@@ -2825,7 +2834,13 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
                        mdb_all_sa.lpSecurityDescriptor = &mdb_null_sd;
                        mdb_sec_inited = 1;
                }
-               mdb_hash_hex(lpath, hexbuf);
+               GetFileInformationByHandle(env->me_lfd, &stbuf);
+               idbuf.volume = stbuf.dwVolumeSerialNumber;
+               idbuf.nhigh  = stbuf.nFileIndexHigh;
+               idbuf.nlow   = stbuf.nFileIndexLow;
+               val.mv_data = &idbuf;
+               val.mv_size = sizeof(idbuf);
+               mdb_hash_hex(&val, hexbuf);
                sprintf(env->me_txns->mti_rmname, "Global\\MDBr%s", hexbuf);
                env->me_rmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_rmname);
                if (!env->me_rmutex) {
@@ -2840,8 +2855,20 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
                }
 #else  /* _WIN32 */
 #ifdef __APPLE__
+               struct stat stbuf;
+               struct {
+                       dev_t dev;
+                       ino_t ino;
+               } idbuf;
+               MDB_val val;
                char hexbuf[17];
-               mdb_hash_hex(lpath, hexbuf);
+
+               fstat(env->me_lfd, &stbuf);
+               idbuf.dev = stbuf.st_dev;
+               idbuf.ino = stbuf.st_ino;
+               val.mv_data = &idbuf;
+               val.mv_size = sizeof(idbuf);
+               mdb_hash_hex(&val, hexbuf);
                sprintf(env->me_txns->mti_rmname, "MDBr%s", hexbuf);
                if (sem_unlink(env->me_txns->mti_rmname)) {
                        rc = ErrCode();