view Python/frozenmain.c @ 87690:66c1c9f32567 default tip

Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents e408e821d6c8
children
line wrap: on
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/* Python interpreter main program for frozen scripts */

#include "Python.h"
#include <locale.h>

#ifdef MS_WINDOWS
extern void PyWinFreeze_ExeInit(void);
extern void PyWinFreeze_ExeTerm(void);
extern int PyInitFrozenExtensions(void);
#endif

/* Main program */

int
Py_FrozenMain(int argc, char **argv)
{
    char *p;
    int i, n, sts = 1;
    int inspect = 0;
    int unbuffered = 0;
    char *oldloc = NULL;
    wchar_t **argv_copy = NULL;
    /* We need a second copies, as Python might modify the first one. */
    wchar_t **argv_copy2 = NULL;

    argv_copy = PyMem_RawMalloc(sizeof(wchar_t*) * argc);
    argv_copy2 = PyMem_RawMalloc(sizeof(wchar_t*) * argc);
    if (!argv_copy || !argv_copy2) {
        fprintf(stderr, "out of memory\n");
        goto error;
    }

    Py_FrozenFlag = 1; /* Suppress errors from getpath.c */

    if ((p = Py_GETENV("PYTHONINSPECT")) && *p != '\0')
        inspect = 1;
    if ((p = Py_GETENV("PYTHONUNBUFFERED")) && *p != '\0')
        unbuffered = 1;

    if (unbuffered) {
        setbuf(stdin, (char *)NULL);
        setbuf(stdout, (char *)NULL);
        setbuf(stderr, (char *)NULL);
    }

    oldloc = _PyMem_RawStrdup(setlocale(LC_ALL, NULL));
    if (!oldloc) {
        fprintf(stderr, "out of memory\n");
        goto error;
    }

    setlocale(LC_ALL, "");
    for (i = 0; i < argc; i++) {
        argv_copy[i] = _Py_char2wchar(argv[i], NULL);
        argv_copy2[i] = argv_copy[i];
        if (!argv_copy[i]) {
            fprintf(stderr, "Unable to decode the command line argument #%i\n",
                            i + 1);
            argc = i;
            goto error;
        }
    }
    setlocale(LC_ALL, oldloc);
    PyMem_RawFree(oldloc);
    oldloc = NULL;

#ifdef MS_WINDOWS
    PyInitFrozenExtensions();
#endif /* MS_WINDOWS */
    Py_SetProgramName(argv_copy[0]);
    Py_Initialize();
#ifdef MS_WINDOWS
    PyWinFreeze_ExeInit();
#endif

    if (Py_VerboseFlag)
        fprintf(stderr, "Python %s\n%s\n",
            Py_GetVersion(), Py_GetCopyright());

    PySys_SetArgv(argc, argv_copy);

    n = PyImport_ImportFrozenModule("__main__");
    if (n == 0)
        Py_FatalError("__main__ not frozen");
    if (n < 0) {
        PyErr_Print();
        sts = 1;
    }
    else
        sts = 0;

    if (inspect && isatty((int)fileno(stdin)))
        sts = PyRun_AnyFile(stdin, "<stdin>") != 0;

#ifdef MS_WINDOWS
    PyWinFreeze_ExeTerm();
#endif
    Py_Finalize();

error:
    PyMem_RawFree(argv_copy);
    if (argv_copy2) {
        for (i = 0; i < argc; i++)
            PyMem_RawFree(argv_copy2[i]);
        PyMem_RawFree(argv_copy2);
    }
    PyMem_RawFree(oldloc);
    return sts;
}