Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: f125bf5f94ece89b42196ec08339a750e0eb3de6 authored by Georg Brandl on 04 March 2012, 15:26:19 UTC
Update copyright years and version name.
Update copyright years and version name.
Tip revision: f125bf5
dynload_shlib.c
/* Support for dynamic loading of extension modules */
#include "Python.h"
#include "importdl.h"
#include <sys/types.h>
#include <sys/stat.h>
#if defined(__NetBSD__)
#include <sys/param.h>
#if (NetBSD < 199712)
#include <nlist.h>
#include <link.h>
#define dlerror() "error in dynamic linking"
#endif
#endif /* NetBSD */
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#if defined(PYOS_OS2) && defined(PYCC_GCC)
#include "dlfcn.h"
#endif
#endif
#if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__)
#define LEAD_UNDERSCORE "_"
#else
#define LEAD_UNDERSCORE ""
#endif
/* The .so extension module ABI tag, supplied by the Makefile via
Makefile.pre.in and configure. This is used to discriminate between
incompatible .so files so that extensions for different Python builds can
live in the same directory. E.g. foomodule.cpython-32.so
*/
const struct filedescr _PyImport_DynLoadFiletab[] = {
#ifdef __CYGWIN__
{".dll", "rb", C_EXTENSION},
#else /* !__CYGWIN__ */
#if defined(PYOS_OS2) && defined(PYCC_GCC)
{".pyd", "rb", C_EXTENSION},
{".dll", "rb", C_EXTENSION},
#else /* !(defined(PYOS_OS2) && defined(PYCC_GCC)) */
#ifdef __VMS
{".exe", "rb", C_EXTENSION},
{".EXE", "rb", C_EXTENSION},
#else /* !__VMS */
{"." SOABI ".so", "rb", C_EXTENSION},
{".abi" PYTHON_ABI_STRING ".so", "rb", C_EXTENSION},
{".so", "rb", C_EXTENSION},
#endif /* __VMS */
#endif /* defined(PYOS_OS2) && defined(PYCC_GCC) */
#endif /* __CYGWIN__ */
{0, 0}
};
static struct {
dev_t dev;
#ifdef __VMS
ino_t ino[3];
#else
ino_t ino;
#endif
void *handle;
} handles[128];
static int nhandles = 0;
dl_funcptr _PyImport_GetDynLoadFunc(const char *shortname,
const char *pathname, FILE *fp)
{
dl_funcptr p;
void *handle;
char funcname[258];
char pathbuf[260];
int dlopenflags=0;
if (strchr(pathname, '/') == NULL) {
/* Prefix bare filename with "./" */
PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname);
pathname = pathbuf;
}
PyOS_snprintf(funcname, sizeof(funcname),
LEAD_UNDERSCORE "PyInit_%.200s", shortname);
if (fp != NULL) {
int i;
struct stat statb;
fstat(fileno(fp), &statb);
for (i = 0; i < nhandles; i++) {
if (statb.st_dev == handles[i].dev &&
statb.st_ino == handles[i].ino) {
p = (dl_funcptr) dlsym(handles[i].handle,
funcname);
return p;
}
}
if (nhandles < 128) {
handles[nhandles].dev = statb.st_dev;
#ifdef __VMS
handles[nhandles].ino[0] = statb.st_ino[0];
handles[nhandles].ino[1] = statb.st_ino[1];
handles[nhandles].ino[2] = statb.st_ino[2];
#else
handles[nhandles].ino = statb.st_ino;
#endif
}
}
#if !(defined(PYOS_OS2) && defined(PYCC_GCC))
dlopenflags = PyThreadState_GET()->interp->dlopenflags;
#endif
if (Py_VerboseFlag)
PySys_WriteStderr("dlopen(\"%s\", %x);\n", pathname,
dlopenflags);
#ifdef __VMS
/* VMS currently don't allow a pathname, use a logical name instead */
/* Concatenate 'python_module_' and shortname */
/* so "import vms.bar" will use the logical python_module_bar */
/* As C module use only one name space this is probably not a */
/* important limitation */
PyOS_snprintf(pathbuf, sizeof(pathbuf), "python_module_%-.200s",
shortname);
pathname = pathbuf;
#endif
handle = dlopen(pathname, dlopenflags);
if (handle == NULL) {
const char *error = dlerror();
if (error == NULL)
error = "unknown dlopen() error";
PyErr_SetString(PyExc_ImportError, error);
return NULL;
}
if (fp != NULL && nhandles < 128)
handles[nhandles++].handle = handle;
p = (dl_funcptr) dlsym(handle, funcname);
return p;
}