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      1 /*---------------------------------------------------------------------------*
      2  *  PFileSystemImpl.c  *
      3  *                                                                           *
      4  *  Copyright 2007, 2008 Nuance Communciations, Inc.                               *
      5  *                                                                           *
      6  *  Licensed under the Apache License, Version 2.0 (the 'License');          *
      7  *  you may not use this file except in compliance with the License.         *
      8  *                                                                           *
      9  *  You may obtain a copy of the License at                                  *
     10  *      http://www.apache.org/licenses/LICENSE-2.0                           *
     11  *                                                                           *
     12  *  Unless required by applicable law or agreed to in writing, software      *
     13  *  distributed under the License is distributed on an 'AS IS' BASIS,        *
     14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
     15  *  See the License for the specific language governing permissions and      *
     16  *  limitations under the License.                                           *
     17  *                                                                           *
     18  *---------------------------------------------------------------------------*/
     19 
     20 #include "LCHAR.h"
     21 #include "PFileSystemImpl.h"
     22 #include "plog.h"
     23 #include "pmemory.h"
     24 
     25 #define MTAG NULL
     26 
     27 ESR_BOOL PFileSystemCreated = ESR_FALSE;
     28 
     29 /**
     30  * [file path, PFileSystem*] mapping.
     31  */
     32 PHashTable* PFileSystemPathMap = NULL;
     33 
     34 /**
     35  * Portable standard input.
     36  */
     37 PFile* PSTDIN = NULL;
     38 /**
     39  * Portable standard output.
     40  */
     41 PFile* PSTDOUT = NULL;
     42 /**
     43  * Portable standard error.
     44  */
     45 PFile* PSTDERR = NULL;
     46 
     47 /**
     48  * Current working directory.
     49  */
     50 LCHAR PFileSystemCurrentDirectory[P_PATH_MAX] = L("/");
     51 
     52 #ifdef USE_THREAD
     53 /* Prototype of private function */
     54 PORTABLE_API ESR_ReturnCode PtrdFlush();
     55 #endif
     56 
     57 
     58 ESR_ReturnCode PFileSystemCreate(void)
     59 {
     60   ESR_ReturnCode rc;
     61 
     62   if (PFileSystemCreated)
     63     return ESR_SUCCESS;
     64 
     65 #ifdef USE_STACKTRACE
     66   CHKLOG(rc, PStackTraceCreate());
     67 #endif
     68   CHKLOG(rc, PHashTableCreate(NULL, MTAG, &PFileSystemPathMap));
     69   CHKLOG(rc, PFileSystemInitializeStreamsImpl());
     70   PFileSystemCreated = ESR_TRUE;
     71   return ESR_SUCCESS;
     72 CLEANUP:
     73   return rc;
     74 }
     75 
     76 ESR_ReturnCode PFileSystemDestroy(void)
     77 {
     78   ESR_ReturnCode rc;
     79   LCHAR* key;
     80   PHashTableEntry* entry;
     81   PHashTableEntry* oldEntry;
     82 
     83   if (!PFileSystemCreated)
     84     return ESR_SUCCESS;
     85   PFileSystemCreated = ESR_FALSE;
     86   if (PFileSystemPathMap != NULL)
     87   {
     88     CHKLOG(rc, PHashTableEntryGetFirst(PFileSystemPathMap, &entry));
     89     while (entry != NULL)
     90     {
     91       CHKLOG(rc, PHashTableEntryGetKeyValue(entry, (void **)&key, (void **)NULL));
     92       oldEntry = entry;
     93       CHKLOG(rc, PHashTableEntryAdvance(&entry));
     94       CHKLOG(rc, PHashTableEntryRemove(oldEntry));
     95       FREE(key);
     96     }
     97     CHKLOG(rc, PHashTableDestroy(PFileSystemPathMap));
     98     PFileSystemPathMap = NULL;
     99   }
    100   CHKLOG(rc, PFileSystemShutdownStreamsImpl());
    101 #ifdef USE_STACKTRACE
    102   CHKLOG(rc, PStackTraceDestroy());
    103 #endif
    104   return ESR_SUCCESS;
    105 CLEANUP:
    106   return rc;
    107 }
    108