diff options
Diffstat (limited to 'mac/tclMacLoad.c')
| -rw-r--r-- | mac/tclMacLoad.c | 42 |
1 files changed, 36 insertions, 6 deletions
diff --git a/mac/tclMacLoad.c b/mac/tclMacLoad.c index a36e151..0b411e0 100644 --- a/mac/tclMacLoad.c +++ b/mac/tclMacLoad.c @@ -10,7 +10,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclMacLoad.c,v 1.13 2002/07/17 20:00:46 vincentdarley Exp $ + * RCS: @(#) $Id: tclMacLoad.c,v 1.14 2002/07/18 15:04:53 vincentdarley Exp $ */ #include <CodeFragments.h> @@ -77,6 +77,15 @@ struct CfrgItem { }; typedef struct CfrgItem CfrgItem; +/* + * On MacOS, old shared libraries which contain many code fragments + * cannot, it seems, be loaded in one go. We need to look provide + * the name of a code fragment while we load. Since with the + * separation of the 'load' and 'findsymbol' be do not necessarily + * know a symbol name at load time, we have to store some further + * information in a structure like this so we can ensure we load + * properly in 'findsymbol' if the first attempts didn't work. + */ typedef struct TclMacLoadInfo { int loaded; CFragConnectionID connID; @@ -90,7 +99,7 @@ static int TryToLoad(Tcl_Interp *interp, TclMacLoadInfo *loadInfo, /* *---------------------------------------------------------------------- * - * TclLoadFile -- + * TclpDlopen -- * * This procedure is called to carry out dynamic loading of binary * code for the Macintosh. This implementation is based on the @@ -147,6 +156,12 @@ TclpDlopen(interp, pathPtr, loadHandle, unloadProcPtr) *unloadProcPtr = &TclpUnloadFile; return TCL_OK; } + +/* + * See the comments about 'struct TclMacLoadInfo' above. This + * function ensures the appropriate library or symbol is + * loaded. + */ static int TryToLoad(Tcl_Interp *interp, TclMacLoadInfo *loadInfo, CONST char *sym /* native */) @@ -239,6 +254,21 @@ TryToLoad(Tcl_Interp *interp, TclMacLoadInfo *loadInfo, return TCL_OK; } +/* + *---------------------------------------------------------------------- + * + * TclpFindSymbol -- + * + * 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. + * + *---------------------------------------------------------------------- + */ Tcl_PackageInitProc* TclpFindSymbol(interp, loadHandle, symbol) Tcl_Interp *interp; @@ -300,13 +330,13 @@ TclpFindSymbol(interp, loadHandle, symbol) */ void -TclpUnloadFile(clientData) - ClientData clientData; /* ClientData returned by a previous call - * to TclpLoadFile(). The clientData is +TclpUnloadFile(loadHandle) + TclLoadHandle loadHandle; /* loadHandle returned by a previous call + * to TclpDlopen(). The loadHandle is * a token that represents the loaded * file. */ { - TclMacLoadInfo *loadInfo = (TclMacLoadInfo *)clientData; + TclMacLoadInfo *loadInfo = (TclMacLoadInfo *)loadHandle; if (loadInfo->loaded) { CloseConnection((CFragConnectionID*) &(loadInfo->connID)); } |