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-rw-r--r--unix/tclLoadDl.c128
1 files changed, 69 insertions, 59 deletions
diff --git a/unix/tclLoadDl.c b/unix/tclLoadDl.c
index 1a51dd8..a78b989 100644
--- a/unix/tclLoadDl.c
+++ b/unix/tclLoadDl.c
@@ -1,16 +1,15 @@
-/*
+/*
* 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.
*
- * RCS: @(#) $Id: tclLoadDl.c,v 1.13 2002/10/10 12:25:53 vincentdarley Exp $
+ * RCS: @(#) $Id: tclLoadDl.c,v 1.14 2005/07/19 13:37:18 dkf Exp $
*/
#include "tclInt.h"
@@ -21,10 +20,10 @@
#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
@@ -40,12 +39,12 @@
*
* 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.
@@ -59,40 +58,42 @@ TclpDlopen(interp, pathPtr, loadHandle, unloadProcPtr)
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
+ * 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;
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) {
- Tcl_AppendResult(interp, "couldn't load file \"",
- Tcl_GetString(pathPtr),
- "\": ", dlerror(), (char *) NULL);
+ Tcl_AppendResult(interp, "couldn't load file \"",
+ Tcl_GetString(pathPtr), "\": ", dlerror(), (char *) NULL);
return TCL_ERROR;
}
@@ -106,35 +107,37 @@ 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;
+TclpFindSymbol(interp, loadHandle, symbol)
+ 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);
@@ -153,9 +156,9 @@ 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.
@@ -168,10 +171,9 @@ 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. */
+ Tcl_LoadHandle loadHandle; /* loadHandle returned by a previous call to
+ * TclpDlopen(). The loadHandle is a token
+ * that represents the loaded file. */
{
VOID *handle;
@@ -184,14 +186,14 @@ 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.
@@ -203,8 +205,16 @@ int
TclGuessPackageName(fileName, bufPtr)
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:
+ */
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