Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
dynload_next.c
/* Support for dynamic loading of extension modules on Mac OS X
** All references to "NeXT" are for historical reasons.
*/
#include "Python.h"
#include "importdl.h"
#include <mach-o/dyld.h>
const struct filedescr _PyImport_DynLoadFiletab[] = {
{".so", "rb", C_EXTENSION},
{"module.so", "rb", C_EXTENSION},
{0, 0}
};
/*
** Python modules are Mach-O MH_BUNDLE files. The best way to load these
** is each in a private namespace, so you can load, say, a module bar and a
** module foo.bar. If we load everything in the global namespace the two
** initbar() symbols will conflict.
** However, it seems some extension packages depend upon being able to access
** each others' global symbols. There seems to be no way to eat our cake and
** have it, so the USE_DYLD_GLOBAL_NAMESPACE define determines which behaviour
** you get.
*/
#ifdef USE_DYLD_GLOBAL_NAMESPACE
#define LINKOPTIONS NSLINKMODULE_OPTION_BINDNOW|NSLINKMODULE_OPTION_RETURN_ON_ERROR
#else
#define LINKOPTIONS NSLINKMODULE_OPTION_BINDNOW| \
NSLINKMODULE_OPTION_RETURN_ON_ERROR|NSLINKMODULE_OPTION_PRIVATE
#endif
dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
const char *pathname, FILE *fp)
{
dl_funcptr p = NULL;
char funcname[258];
NSObjectFileImageReturnCode rc;
NSObjectFileImage image;
NSModule newModule;
NSSymbol theSym;
const char *errString;
char errBuf[512];
PyOS_snprintf(funcname, sizeof(funcname), "_init%.200s", shortname);
#ifdef USE_DYLD_GLOBAL_NAMESPACE
if (NSIsSymbolNameDefined(funcname)) {
theSym = NSLookupAndBindSymbol(funcname);
p = (dl_funcptr)NSAddressOfSymbol(theSym);
return p;
}
#endif
rc = NSCreateObjectFileImageFromFile(pathname, &image);
switch(rc) {
default:
case NSObjectFileImageFailure:
case NSObjectFileImageFormat:
/* for these a message is printed on stderr by dyld */
errString = "Can't create object file image";
break;
case NSObjectFileImageSuccess:
errString = NULL;
break;
case NSObjectFileImageInappropriateFile:
errString = "Inappropriate file type for dynamic loading";
break;
case NSObjectFileImageArch:
errString = "Wrong CPU type in object file";
break;
case NSObjectFileImageAccess:
errString = "Can't read object file (no access)";
break;
}
if (errString == NULL) {
newModule = NSLinkModule(image, pathname, LINKOPTIONS);
if (newModule == NULL) {
int errNo;
const char *fileName, *moreErrorStr;
NSLinkEditErrors c;
NSLinkEditError( &c, &errNo, &fileName, &moreErrorStr );
PyOS_snprintf(errBuf, 512, "Failure linking new module: %s: %s",
fileName, moreErrorStr);
errString = errBuf;
}
}
if (errString != NULL) {
PyErr_SetString(PyExc_ImportError, errString);
return NULL;
}
#ifdef USE_DYLD_GLOBAL_NAMESPACE
if (!NSIsSymbolNameDefined(funcname)) {
/* UnlinkModule() isn't implemented in current versions, but calling it does no harm */
/* NSUnLinkModule(newModule, FALSE); removed: causes problems for ObjC code */
PyErr_Format(PyExc_ImportError,
"Loaded module does not contain symbol %.200s",
funcname);
return NULL;
}
theSym = NSLookupAndBindSymbol(funcname);
#else
theSym = NSLookupSymbolInModule(newModule, funcname);
if ( theSym == NULL ) {
/* NSUnLinkModule(newModule, FALSE); removed: causes problems for ObjC code */
PyErr_Format(PyExc_ImportError,
"Loaded module does not contain symbol %.200s",
funcname);
return NULL;
}
#endif
p = (dl_funcptr)NSAddressOfSymbol(theSym);
return p;
}