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python3.2  3.2.2
Defines | Functions | Variables
dynload_shlib.c File Reference
#include "Python.h"
#include "importdl.h"
#include <sys/types.h>
#include <sys/stat.h>

Go to the source code of this file.

Defines

#define LEAD_UNDERSCORE   ""

Functions

dl_funcptr _PyImport_GetDynLoadFunc (const char *fqname, const char *shortname, const char *pathname, FILE *fp)

Variables

struct {
dev_t dev
ino_t ino
voidhandle
handles [128]
static int nhandles = 0

Define Documentation

#define LEAD_UNDERSCORE   ""

Definition at line 30 of file dynload_shlib.c.


Function Documentation

dl_funcptr _PyImport_GetDynLoadFunc ( const char *  fqname,
const char *  shortname,
const char *  pathname,
FILE *  fp 
)

Definition at line 78 of file dynload_shlib.c.

{
    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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Variable Documentation

struct { ... } handles[128] [static]
int nhandles = 0 [static]

Definition at line 75 of file dynload_shlib.c.