/* ****************************************************************************** * * Copyright (C) 1999-2001, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************/ /*---------------------------------------------------------------------------------- * * Memory mapped file wrappers for use by the ICU Data Implementation * All of the platform-specific implementation for mapping data files * is here. The rest of the ICU Data implementation uses only the * wrapper functions. * *----------------------------------------------------------------------------------*/ #include "unicode/utypes.h" #include "udatamem.h" #include "umapfile.h" /* memory-mapping base definitions ------------------------------------------ */ #define MAP_WIN32 1 #define MAP_POSIX 2 #define MAP_FILE_STREAM 3 #define MAP_390DLL 4 #ifdef WIN32 # define WIN32_LEAN_AND_MEAN # define NOGDI # define NOUSER # define NOSERVICE # define NOIME # define NOMCX # include typedef HANDLE MemoryMap; # define IS_MAP(map) ((map)!=NULL) # define MAP_IMPLEMENTATION MAP_WIN32 /* ### Todo: auto detect mmap(). Until then, just add your platform here. */ #elif U_HAVE_MMAP typedef size_t MemoryMap; # define IS_MAP(map) ((map)!=0) # include # include # include # include # ifndef MAP_FAILED # define MAP_FAILED ((void*)-1) # endif # define MAP_IMPLEMENTATION MAP_POSIX #elif OS390 /* No memory mapping for 390 batch mode. Fake it using dll loading. */ # include # define MAP_IMPLEMENTATION MAP_390DLL #else /* unknown platform, no memory map implementation: use FileStream/uprv_malloc() instead */ # include "filestrm.h" typedef void *MemoryMap; # define IS_MAP(map) ((map)!=NULL) # define MAP_IMPLEMENTATION MAP_FILE_STREAM #endif /*----------------------------------------------------------------------------------* * * * Memory Mapped File support. Platform dependent implementation of functions * * used by the rest of the implementation. * * * *----------------------------------------------------------------------------------*/ #if MAP_IMPLEMENTATION==MAP_WIN32 UBool uprv_mapFile( UDataMemory *pData, /* Fill in with info on the result doing the mapping. */ /* Output only; any original contents are cleared. */ const char *path /* File path to be opened/mapped */ ) { HANDLE map; HANDLE file; UDataMemory_init(pData); /* Clear the output struct. */ /* open the input file */ file=CreateFile(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL|FILE_FLAG_RANDOM_ACCESS, NULL); if(file==INVALID_HANDLE_VALUE) { return FALSE; } /* create an unnamed Windows file-mapping object for the specified file */ map=CreateFileMapping(file, NULL, PAGE_READONLY, 0, 0, NULL); CloseHandle(file); if(map==NULL) { return FALSE; } /* map a view of the file into our address space */ pData->pHeader=(const DataHeader *)MapViewOfFile(map, FILE_MAP_READ, 0, 0, 0); if(pData->pHeader==NULL) { CloseHandle(map); return FALSE; } pData->map=map; return TRUE; } void uprv_unmapFile(UDataMemory *pData) { if(pData!=NULL && pData->map!=NULL) { UnmapViewOfFile(pData->pHeader); CloseHandle(pData->map); pData->pHeader=NULL; pData->map=NULL; } } #elif MAP_IMPLEMENTATION==MAP_POSIX UBool uprv_mapFile(UDataMemory *pData, const char *path) { int fd; int length; struct stat mystat; void *data; UDataMemory_init(pData); /* Clear the output struct. */ /* determine the length of the file */ if(stat(path, &mystat)!=0 || mystat.st_size<=0) { return FALSE; } length=mystat.st_size; /* open the file */ fd=open(path, O_RDONLY); if(fd==-1) { return FALSE; } /* get a view of the mapping */ #ifndef HPUX data=mmap(0, length, PROT_READ, MAP_SHARED, fd, 0); #else data=mmap(0, length, PROT_READ, MAP_PRIVATE, fd, 0); #endif close(fd); /* no longer needed */ if(data==MAP_FAILED) { return FALSE; } pData->map = (char *)data + length; pData->pHeader=(const DataHeader *)data; pData->mapAddr = data; return TRUE; } void uprv_unmapFile(UDataMemory *pData) { if(pData!=NULL && pData->map!=NULL) { size_t dataLen = (char *)pData->map - (char *)pData->mapAddr; if(munmap(pData->mapAddr, dataLen)==-1) { } pData->pHeader=NULL; pData->map=0; pData->mapAddr=NULL; } } #elif MAP_IMPLEMENTATION==MAP_FILE_STREAM static UBool uprv_mapFile(UDataMemory *pData, const char *path) { FileStream *file; int32_t fileLength; void *p; UDataMemory_init(pData); /* Clear the output struct. */ /* open the input file */ file=T_FileStream_open(path, "rb"); if(file==NULL) { return FALSE; } /* get the file length */ fileLength=T_FileStream_size(file); if(T_FileStream_error(file) || fileLength<=20) { T_FileStream_close(file); return FALSE; } /* allocate the memory to hold the file data */ p=uprv_malloc(fileLength); if(p==NULL) { T_FileStream_close(file); return FALSE; } /* read the file */ if(fileLength!=T_FileStream_read(file, p, fileLength)) { uprv_free(p); T_FileStream_close(file); return FALSE; } T_FileStream_close(file); pData->map=p; pData->pHeader=(const DataHeader *)p; pData->mapAddr=p; return TRUE; } static void uprv_unmapFile(UDataMemory *pData) { if(pData!=NULL && pData->map!=NULL) { uprv_free(pData->map); pData->map = NULL; pData->mapAddr = NULL; pData->pHeader = NULL; } } #elif MAP_IMPLEMENTATION==MAP_390DLL /* 390 specific Library Loading. * This is the only platform left that dynamically loads an ICU Data Library. * All other platforms use .data files when dynamic loading is required, but * this turn out to be awkward to support in 390 batch mode. * * The idea here is to hide the fact that 390 is using dll loading from the * rest of ICU, and make it look like there is file loading happening. * */ uprv_mapFile(UDataMemory *pData, const char *path) { /* TODO: turn the path into a dll name, try to load it, * if successful, set the the pHeader field of the UDataMemory * to the data address. * * (If path has a ".dat" extension, take it off and add on whatever * the standard shared library extension is?) */ } void uprv_unmapFile(UDataMemory *pData) { if(pData!=NULL && pData->map!=NULL) { /* TODO: whatever. Doesn't really need to do anything. */ } } # define RTLD_LAZY 0 # define RTLD_GLOBAL 0 static void *dlopen(const char *filename, int flag) { dllhandle *handle; # ifdef UDATA_DEBUG fprintf(stderr, "dllload: %s ", filename); # endif handle=dllload(filename); # ifdef UDATA_DEBUG fprintf(stderr, " -> %08X\n", handle ); # endif return handle; } static void *dlsym(void *h, const char *symbol) { void *val=0; val=dllqueryvar((dllhandle*)h,symbol); # ifdef UDATA_DEBUG fprintf(stderr, "dllqueryvar(%08X, %s) -> %08X\n", h, symbol, val); # endif return val; } static int dlclose(void *handle) { # ifdef UDATA_DEBUG fprintf(stderr, "dllfree: %08X\n", handle); # endif return dllfree((dllhandle*)handle); } /* TODO: the following code is just a mish-mash of pieces from the * previous OS390 data library loading code that might be useful * in putting together something that works. */ #if 0 Library lib; inBasename=U_ICUDATA_NAME"_390"; suffix=strcpy_returnEnd(basename, inBasename); uprv_strcpy(suffix, LIB_SUFFIX); if (uprv_isOS390BatchMode()) { /* ### hack: we still need to get u_getDataDirectory() fixed for OS/390 (batch mode - always return "//"? ) and this here straightened out with LIB_PREFIX and LIB_SUFFIX (both empty?!) This is probably due to the strange file system on OS/390. It's more like a database with short entry names than a typical file system. */ if (s390dll) { lib=LOAD_LIBRARY("//IXMICUD1", "//IXMICUD1"); } else { /* U_ICUDATA_NAME should always have the correct name */ /* 390port: BUT FOR BATCH MODE IT IS AN EXCEPTION ... */ /* 390port: THE NEXT LINE OF CODE WILL NOT WORK !!!!! */ /*lib=LOAD_LIBRARY("//" U_ICUDATA_NAME, "//" U_ICUDATA_NAME);*/ lib=LOAD_LIBRARY("//IXMICUDA", "//IXMICUDA"); /*390port*/ } } lib=LOAD_LIBRARY(pathBuffer, basename); if(!IS_LIBRARY(lib) && basename!=pathBuffer) { /* try basename only next */ lib=LOAD_LIBRARY(basename, basename); } if(IS_LIBRARY(lib)) { /* we have a data DLL - what kind of lookup do we need here? */ char entryName[100]; const DataHeader *pHeader; *basename=0; } udata_checkCommonData(&tData, pErrorCode); if (U_SUCCESS(*pErrorCode)) { /* Don't close the old data - someone might be using it * May need to change the global to be a pointer rather than a static struct * to get a clean switch-over. */ setCommonICUData(&tData); } umtx_unlock(NULL); return TRUE; /* SUCCESS? */ #endif #else # error MAP_IMPLEMENTATION is set incorrectly #endif