EmbeddedPkg: Extend NvVarStoreFormattedLib LIBRARY_CLASS

[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.2 / Python / dynload_shlib.c

\r
/* Support for dynamic loading of extension modules */\r
\r
#include "Python.h"\r
#include "importdl.h"\r
\r
#include <sys/types.h>\r
#include <sys/stat.h>\r
\r
#if defined(__NetBSD__)\r
#include <sys/param.h>\r
#if (NetBSD < 199712)\r
#include <nlist.h>\r
#include <link.h>\r
#define dlerror() "error in dynamic linking"\r
#endif\r
#endif /* NetBSD */\r
\r
#ifdef HAVE_DLFCN_H\r
#include <dlfcn.h>\r
#else\r
#if defined(PYOS_OS2) && defined(PYCC_GCC)\r
#include "dlfcn.h"\r
#endif\r
#endif\r
\r
#if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__)\r
#define LEAD_UNDERSCORE "_"\r
#else\r
#define LEAD_UNDERSCORE ""\r
#endif\r
\r
\r
const struct filedescr _PyImport_DynLoadFiletab[] = {\r
#ifdef __CYGWIN__\r
    {".dll", "rb", C_EXTENSION},\r
    {"module.dll", "rb", C_EXTENSION},\r
#else\r
#if defined(PYOS_OS2) && defined(PYCC_GCC)\r
    {".pyd", "rb", C_EXTENSION},\r
    {".dll", "rb", C_EXTENSION},\r
#else\r
#ifdef __VMS\r
    {".exe", "rb", C_EXTENSION},\r
    {".EXE", "rb", C_EXTENSION},\r
    {"module.exe", "rb", C_EXTENSION},\r
    {"MODULE.EXE", "rb", C_EXTENSION},\r
#else\r
    {".so", "rb", C_EXTENSION},\r
    {"module.so", "rb", C_EXTENSION},\r
#endif\r
#endif\r
#endif\r
    {0, 0}\r
};\r
\r
static struct {\r
    dev_t dev;\r
#ifdef __VMS\r
    ino_t ino[3];\r
#else\r
    ino_t ino;\r
#endif\r
    void *handle;\r
} handles[128];\r
static int nhandles = 0;\r
\r
\r
dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,\r
                                    const char *pathname, FILE *fp)\r
{\r
    dl_funcptr p;\r
    void *handle;\r
    char funcname[258];\r
    char pathbuf[260];\r
    int dlopenflags=0;\r
\r
    if (strchr(pathname, '/') == NULL) {\r
        /* Prefix bare filename with "./" */\r
        PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname);\r
        pathname = pathbuf;\r
    }\r
\r
    PyOS_snprintf(funcname, sizeof(funcname),\r
                  LEAD_UNDERSCORE "init%.200s", shortname);\r
\r
    if (fp != NULL) {\r
        int i;\r
        struct stat statb;\r
        fstat(fileno(fp), &statb);\r
        for (i = 0; i < nhandles; i++) {\r
            if (statb.st_dev == handles[i].dev &&\r
                statb.st_ino == handles[i].ino) {\r
                p = (dl_funcptr) dlsym(handles[i].handle,\r
                                       funcname);\r
                return p;\r
            }\r
        }\r
        if (nhandles < 128) {\r
            handles[nhandles].dev = statb.st_dev;\r
#ifdef __VMS\r
            handles[nhandles].ino[0] = statb.st_ino[0];\r
            handles[nhandles].ino[1] = statb.st_ino[1];\r
            handles[nhandles].ino[2] = statb.st_ino[2];\r
#else\r
            handles[nhandles].ino = statb.st_ino;\r
#endif\r
        }\r
    }\r
\r
#if !(defined(PYOS_OS2) && defined(PYCC_GCC))\r
    dlopenflags = PyThreadState_GET()->interp->dlopenflags;\r
#endif\r
\r
    if (Py_VerboseFlag)\r
        PySys_WriteStderr("dlopen(\"%s\", %x);\n", pathname,\r
                          dlopenflags);\r
\r
#ifdef __VMS\r
    /* VMS currently don't allow a pathname, use a logical name instead */\r
    /* Concatenate 'python_module_' and shortname */\r
    /* so "import vms.bar" will use the logical python_module_bar */\r
    /* As C module use only one name space this is probably not a */\r
    /* important limitation */\r
    PyOS_snprintf(pathbuf, sizeof(pathbuf), "python_module_%-.200s",\r
                  shortname);\r
    pathname = pathbuf;\r
#endif\r
\r
    handle = dlopen(pathname, dlopenflags);\r
\r
    if (handle == NULL) {\r
        const char *error = dlerror();\r
        if (error == NULL)\r
            error = "unknown dlopen() error";\r
        PyErr_SetString(PyExc_ImportError, error);\r
        return NULL;\r
    }\r
    if (fp != NULL && nhandles < 128)\r
        handles[nhandles++].handle = handle;\r
    p = (dl_funcptr) dlsym(handle, funcname);\r
    return p;\r
}\r