Staging
v0.8.1
v0.8.1
Revision 3a4875e5e3818680adc48abfc507c2176876f22f authored by Eli Bendersky on 26 March 2012, 18:43:32 UTC, committed by Eli Bendersky on 26 March 2012, 18:43:32 UTC
samples and a reference. Also fix the other nits mentioned in the issue. This also partially addresses issue #14006.
1 parent 70ea34d
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;
}
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