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authorvincentdarley <vincentdarley>2002-07-18 15:04:51 (GMT)
committervincentdarley <vincentdarley>2002-07-18 15:04:51 (GMT)
commitb355103baab13c260a35798a589f4357f9fd115a (patch)
treef356d5d56da72d498b37011b9e007ccb03fade54 /mac/tclMacLoad.c
parent20f90f51f25cf3474e10150eebc6f1e23f68a0db (diff)
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load comments and clientData replacement
Diffstat (limited to 'mac/tclMacLoad.c')
-rw-r--r--mac/tclMacLoad.c42
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));
}