diff options
Diffstat (limited to 'unix/tclLoadDl.c')
| -rw-r--r-- | unix/tclLoadDl.c | 153 |
1 files changed, 82 insertions, 71 deletions
diff --git a/unix/tclLoadDl.c b/unix/tclLoadDl.c index 9903d05..e9ff134 100644 --- a/unix/tclLoadDl.c +++ b/unix/tclLoadDl.c @@ -1,14 +1,13 @@ -/* +/* * tclLoadDl.c -- * - * This procedure provides a version of the TclLoadFile that - * works with the "dlopen" and "dlsym" library procedures for - * dynamic loading. + * This procedure provides a version of the TclLoadFile that works with + * the "dlopen" and "dlsym" library procedures for dynamic loading. * * Copyright (c) 1995-1997 Sun Microsystems, Inc. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tclInt.h" @@ -19,10 +18,10 @@ #endif /* - * In some systems, like SunOS 4.1.3, the RTLD_NOW flag isn't defined - * and this argument to dlopen must always be 1. The RTLD_GLOBAL - * flag is needed on some systems (e.g. SCO and UnixWare) but doesn't - * exist on others; if it doesn't exist, set it to 0 so it has no effect. + * In some systems, like SunOS 4.1.3, the RTLD_NOW flag isn't defined and this + * argument to dlopen must always be 1. The RTLD_GLOBAL flag is needed on some + * systems (e.g. SCO and UnixWare) but doesn't exist on others; if it doesn't + * exist, set it to 0 so it has no effect. */ #ifndef RTLD_NOW @@ -38,12 +37,12 @@ * * TclpDlopen -- * - * Dynamically loads a binary code file into memory and returns - * a handle to the new code. + * Dynamically loads a binary code file into memory and returns a handle + * to the new code. * * Results: - * A standard Tcl completion code. If an error occurs, an error - * message is left in the interp's result. + * A standard Tcl completion code. If an error occurs, an error message + * is left in the interp's result. * * Side effects: * New code suddenly appears in memory. @@ -52,56 +51,59 @@ */ int -TclpDlopen(interp, pathPtr, loadHandle, unloadProcPtr) - Tcl_Interp *interp; /* Used for error reporting. */ - Tcl_Obj *pathPtr; /* Name of the file containing the desired +TclpDlopen( + Tcl_Interp *interp, /* Used for error reporting. */ + Tcl_Obj *pathPtr, /* Name of the file containing the desired * code (UTF-8). */ - Tcl_LoadHandle *loadHandle; /* Filled with token for dynamically loaded - * file which will be passed back to + Tcl_LoadHandle *loadHandle, /* Filled with token for dynamically loaded + * file which will be passed back to * (*unloadProcPtr)() to unload the file. */ - Tcl_FSUnloadFileProc **unloadProcPtr; + Tcl_FSUnloadFileProc **unloadProcPtr) /* Filled with address of Tcl_FSUnloadFileProc - * function which should be used for - * this file. */ + * function which should be used for this + * file. */ { - VOID *handle; + void *handle; CONST char *native; - /* - * First try the full path the user gave us. This is particularly - * important if the cwd is inside a vfs, and we are trying to load - * using a relative path. + /* + * First try the full path the user gave us. This is particularly + * important if the cwd is inside a vfs, and we are trying to load using a + * relative path. */ + native = Tcl_FSGetNativePath(pathPtr); handle = dlopen(native, RTLD_NOW | RTLD_GLOBAL); if (handle == NULL) { - /* - * Let the OS loader examine the binary search path for - * whatever string the user gave us which hopefully refers - * to a file on the binary path + /* + * Let the OS loader examine the binary search path for whatever + * string the user gave us which hopefully refers to a file on the + * binary path. */ + Tcl_DString ds; char *fileName = Tcl_GetString(pathPtr); + native = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds); handle = dlopen(native, RTLD_NOW | RTLD_GLOBAL); Tcl_DStringFree(&ds); } - + if (handle == NULL) { /* * Write the string to a variable first to work around a compiler bug * in the Sun Forte 6 compiler. [Bug 1503729] */ - CONST char *errorStr = dlerror(); + const char *errorStr = dlerror(); - Tcl_AppendResult(interp, "couldn't load file \"", - Tcl_GetString(pathPtr), "\": ", errorStr, (char *) NULL); + Tcl_AppendResult(interp, "couldn't load file \"", + Tcl_GetString(pathPtr), "\": ", errorStr, NULL); return TCL_ERROR; } *unloadProcPtr = &TclpUnloadFile; - *loadHandle = (Tcl_LoadHandle)handle; + *loadHandle = (Tcl_LoadHandle) handle; return TCL_OK; } @@ -110,40 +112,42 @@ TclpDlopen(interp, pathPtr, loadHandle, unloadProcPtr) * * TclpFindSymbol -- * - * Looks up a symbol, by name, through a handle associated with - * a previously loaded piece of code (shared library). + * Looks up a symbol, by name, through a handle associated with a + * previously loaded piece of code (shared library). * * Results: - * Returns a pointer to the function associated with 'symbol' if - * it is found. Otherwise returns NULL and may leave an error - * message in the interp's result. + * Returns a pointer to the function associated with 'symbol' if it is + * found. Otherwise returns NULL and may leave an error message in the + * interp's result. * *---------------------------------------------------------------------- */ -Tcl_PackageInitProc* -TclpFindSymbol(interp, loadHandle, symbol) - Tcl_Interp *interp; - Tcl_LoadHandle loadHandle; - CONST char *symbol; + +Tcl_PackageInitProc * +TclpFindSymbol( + Tcl_Interp *interp, /* Place to put error messages. */ + Tcl_LoadHandle loadHandle, /* Value from TcpDlopen(). */ + CONST char *symbol) /* Symbol to look up. */ { CONST char *native; Tcl_DString newName, ds; VOID *handle = (VOID*)loadHandle; Tcl_PackageInitProc *proc; - /* + + /* * Some platforms still add an underscore to the beginning of symbol - * names. If we can't find a name without an underscore, try again - * with the underscore. + * names. If we can't find a name without an underscore, try again with + * the underscore. */ native = Tcl_UtfToExternalDString(NULL, symbol, -1, &ds); proc = (Tcl_PackageInitProc *) dlsym(handle, /* INTL: Native. */ - native); + native); if (proc == NULL) { Tcl_DStringInit(&newName); Tcl_DStringAppend(&newName, "_", 1); native = Tcl_DStringAppend(&newName, native, -1); - proc = (Tcl_PackageInitProc *) dlsym(handle, /* INTL: Native. */ + proc = (Tcl_PackageInitProc *) dlsym(handle, /* INTL: Native. */ native); Tcl_DStringFree(&newName); } @@ -157,9 +161,9 @@ TclpFindSymbol(interp, loadHandle, symbol) * * TclpUnloadFile -- * - * Unloads a dynamically loaded binary code file from memory. - * Code pointers in the formerly loaded file are no longer valid - * after calling this function. + * Unloads a dynamically loaded binary code file from memory. Code + * pointers in the formerly loaded file are no longer valid after calling + * this function. * * Results: * None. @@ -171,15 +175,14 @@ TclpFindSymbol(interp, loadHandle, symbol) */ void -TclpUnloadFile(loadHandle) - Tcl_LoadHandle loadHandle; /* loadHandle returned by a previous call - * to TclpDlopen(). The loadHandle is - * a token that represents the loaded - * file. */ +TclpUnloadFile( + Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to + * TclpDlopen(). The loadHandle is a token + * that represents the loaded file. */ { - VOID *handle; + void *handle; - handle = (VOID *) loadHandle; + handle = (void *) loadHandle; dlclose(handle); } @@ -188,14 +191,14 @@ TclpUnloadFile(loadHandle) * * TclGuessPackageName -- * - * If the "load" command is invoked without providing a package - * name, this procedure is invoked to try to figure it out. + * If the "load" command is invoked without providing a package name, + * this procedure is invoked to try to figure it out. * * Results: - * Always returns 0 to indicate that we couldn't figure out a - * package name; generic code will then try to guess the package - * from the file name. A return value of 1 would have meant that - * we figured out the package name and put it in bufPtr. + * Always returns 0 to indicate that we couldn't figure out a package + * name; generic code will then try to guess the package from the file + * name. A return value of 1 would have meant that we figured out the + * package name and put it in bufPtr. * * Side effects: * None. @@ -204,11 +207,19 @@ TclpUnloadFile(loadHandle) */ int -TclGuessPackageName(fileName, bufPtr) - CONST char *fileName; /* Name of file containing package (already +TclGuessPackageName( + CONST char *fileName, /* Name of file containing package (already * translated to local form if needed). */ - Tcl_DString *bufPtr; /* Initialized empty dstring. Append - * package name to this if possible. */ + Tcl_DString *bufPtr) /* Initialized empty dstring. Append package + * name to this if possible. */ { return 0; } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |