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authorDana Robinson <43805+derobins@users.noreply.github.com>2021-03-11 21:34:55 (GMT)
committerGitHub <noreply@github.com>2021-03-11 21:34:55 (GMT)
commit6f760f200d6cb959c960b936af3fb2e68a55afde (patch)
tree65417bef3aaa8b351000377ad20de6687e34830f /java/test/TestH5Rref.java
parenta78aae1150ffdfd44ef64c46da099c9412a7c3d0 (diff)
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Replaces checks for fork, etc. with checks for unistd.h (#457)
* Replaces checks for fork, etc. with H5_HAVE_UNISTD_H Code previously checked for individual POSIX API calls using H5_HAVE_FORK, etc. The calls we use have been standardized for decades and available via unistd.h. Some test messages that were missing when tests are skipped due to a lack of unistd.h were also added. The configure checks for individual POSIX API calls will be removed in a later commit. * Stupid formatter
Diffstat (limited to 'java/test/TestH5Rref.java')
0 files changed, 0 insertions, 0 deletions
generated by cgit v0.12 at 2024-07-25 09:33:43 (GMT)
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/* Generator object implementation */

#include "Python.h"
#include "frameobject.h"
#include "structmember.h"
#include "opcode.h"

static PyObject *gen_close(PyGenObject *gen, PyObject *args);

static int
gen_traverse(PyGenObject *gen, visitproc visit, void *arg)
{
    Py_VISIT((PyObject *)gen->gi_frame);
    Py_VISIT(gen->gi_code);
    Py_VISIT(gen->gi_name);
    Py_VISIT(gen->gi_qualname);
    return 0;
}

void
_PyGen_Finalize(PyObject *self)
{
    PyGenObject *gen = (PyGenObject *)self;
    PyObject *res;
    PyObject *error_type, *error_value, *error_traceback;

    if (gen->gi_frame == NULL || gen->gi_frame->f_stacktop == NULL)
        /* Generator isn't paused, so no need to close */
        return;

    /* Save the current exception, if any. */
    PyErr_Fetch(&error_type, &error_value, &error_traceback);

    res = gen_close(gen, NULL);

    if (res == NULL)
        PyErr_WriteUnraisable(self);
    else
        Py_DECREF(res);

    /* Restore the saved exception. */
    PyErr_Restore(error_type, error_value, error_traceback);
}

static void
gen_dealloc(PyGenObject *gen)
{
    PyObject *self = (PyObject *) gen;

    _PyObject_GC_UNTRACK(gen);

    if (gen->gi_weakreflist != NULL)
        PyObject_ClearWeakRefs(self);

    _PyObject_GC_TRACK(self);

    if (PyObject_CallFinalizerFromDealloc(self))
        return;                     /* resurrected.  :( */

    _PyObject_GC_UNTRACK(self);
    Py_CLEAR(gen->gi_frame);
    Py_CLEAR(gen->gi_code);
    Py_CLEAR(gen->gi_name);
    Py_CLEAR(gen->gi_qualname);
    PyObject_GC_Del(gen);
}

static PyObject *
gen_send_ex(PyGenObject *gen, PyObject *arg, int exc)
{
    PyThreadState *tstate = PyThreadState_GET();
    PyFrameObject *f = gen->gi_frame;
    PyObject *result;

    if (gen->gi_running) {
        PyErr_SetString(PyExc_ValueError,
                        "generator already executing");
        return NULL;
    }
    if (f == NULL || f->f_stacktop == NULL) {
        /* Only set exception if called from send() */
        if (arg && !exc)
            PyErr_SetNone(PyExc_StopIteration);
        return NULL;
    }

    if (f->f_lasti == -1) {
        if (arg && arg != Py_None) {
            PyErr_SetString(PyExc_TypeError,
                            "can't send non-None value to a "
                            "just-started generator");
            return NULL;
        }
    } else {
        /* Push arg onto the frame's value stack */
        result = arg ? arg : Py_None;
        Py_INCREF(result);
        *(f->f_stacktop++) = result;
    }

    /* Generators always return to their most recent caller, not
     * necessarily their creator. */
    Py_XINCREF(tstate->frame);
    assert(f->f_back == NULL);
    f->f_back = tstate->frame;

    gen->gi_running = 1;
    result = PyEval_EvalFrameEx(f, exc);
    gen->gi_running = 0;

    /* Don't keep the reference to f_back any longer than necessary.  It
     * may keep a chain of frames alive or it could create a reference
     * cycle. */
    assert(f->f_back == tstate->frame);
    Py_CLEAR(f->f_back);

    /* If the generator just returned (as opposed to yielding), signal
     * that the generator is exhausted. */
    if (result && f->f_stacktop == NULL) {
        if (result == Py_None) {
            /* Delay exception instantiation if we can */
            PyErr_SetNone(PyExc_StopIteration);
        } else {
            PyObject *e = PyObject_CallFunctionObjArgs(
                               PyExc_StopIteration, result, NULL);
            if (e != NULL) {
                PyErr_SetObject(PyExc_StopIteration, e);
                Py_DECREF(e);
            }
        }
        Py_CLEAR(result);
    }

    if (!result || f->f_stacktop == NULL) {
        /* generator can't be rerun, so release the frame */
        /* first clean reference cycle through stored exception traceback */
        PyObject *t, *v, *tb;
        t = f->f_exc_type;
        v = f->f_exc_value;
        tb = f->f_exc_traceback;
        f->f_exc_type = NULL;
        f->f_exc_value = NULL;
        f->f_exc_traceback = NULL;
        Py_XDECREF(t);
        Py_XDECREF(v);
        Py_XDECREF(tb);
        gen->gi_frame->f_gen = NULL;
        gen->gi_frame = NULL;
        Py_DECREF(f);
    }

    return result;
}

PyDoc_STRVAR(send_doc,
"send(arg) -> send 'arg' into generator,\n\
return next yielded value or raise StopIteration.");

PyObject *
_PyGen_Send(PyGenObject *gen, PyObject *arg)
{
    return gen_send_ex(gen, arg, 0);
}

PyDoc_STRVAR(close_doc,
"close() -> raise GeneratorExit inside generator.");

/*
 *   This helper function is used by gen_close and gen_throw to
 *   close a subiterator being delegated to by yield-from.
 */

static int
gen_close_iter(PyObject *yf)
{
    PyObject *retval = NULL;
    _Py_IDENTIFIER(close);

    if (PyGen_CheckExact(yf)) {
        retval = gen_close((PyGenObject *)yf, NULL);
        if (retval == NULL)
            return -1;
    } else {
        PyObject *meth = _PyObject_GetAttrId(yf, &PyId_close);
        if (meth == NULL) {
            if (!PyErr_ExceptionMatches(PyExc_AttributeError))
                PyErr_WriteUnraisable(yf);
            PyErr_Clear();
        } else {
            retval = PyObject_CallFunction(meth, "");
            Py_DECREF(meth);
            if (retval == NULL)
                return -1;
        }
    }
    Py_XDECREF(retval);
    return 0;
}

static PyObject *
gen_yf(PyGenObject *gen)
{
    PyObject *yf = NULL;
    PyFrameObject *f = gen->gi_frame;

    if (f && f->f_stacktop) {
        PyObject *bytecode = f->f_code->co_code;
        unsigned char *code = (unsigned char *)PyBytes_AS_STRING(bytecode);

        if (code[f->f_lasti + 1] != YIELD_FROM)
            return NULL;
        yf = f->f_stacktop[-1];
        Py_INCREF(yf);
    }

    return yf;
}

static PyObject *
gen_close(PyGenObject *gen, PyObject *args)
{
    PyObject *retval;
    PyObject *yf = gen_yf(gen);
    int err = 0;

    if (yf) {
        gen->gi_running = 1;
        err = gen_close_iter(yf);
        gen->gi_running = 0;
        Py_DECREF(yf);
    }
    if (err == 0)
        PyErr_SetNone(PyExc_GeneratorExit);
    retval = gen_send_ex(gen, Py_None, 1);
    if (retval) {
        Py_DECREF(retval);
        PyErr_SetString(PyExc_RuntimeError,
                        "generator ignored GeneratorExit");
        return NULL;
    }
    if (PyErr_ExceptionMatches(PyExc_StopIteration)
        || PyErr_ExceptionMatches(PyExc_GeneratorExit)) {
        PyErr_Clear();          /* ignore these errors */
        Py_INCREF(Py_None);
        return Py_None;
    }
    return NULL;
}


PyDoc_STRVAR(throw_doc,
"throw(typ[,val[,tb]]) -> raise exception in generator,\n\
return next yielded value or raise StopIteration.");

static PyObject *
gen_throw(PyGenObject *gen, PyObject *args)
{
    PyObject *typ;
    PyObject *tb = NULL;
    PyObject *val = NULL;
    PyObject *yf = gen_yf(gen);
    _Py_IDENTIFIER(throw);

    if (!PyArg_UnpackTuple(args, "throw", 1, 3, &typ, &val, &tb))
        return NULL;

    if (yf) {
        PyObject *ret;
        int err;
        if (PyErr_GivenExceptionMatches(typ, PyExc_GeneratorExit)) {
            gen->gi_running = 1;
            err = gen_close_iter(yf);
            gen->gi_running = 0;
            Py_DECREF(yf);
            if (err < 0)
                return gen_send_ex(gen, Py_None, 1);
            goto throw_here;
        }
        if (PyGen_CheckExact(yf)) {
            gen->gi_running = 1;
            ret = gen_throw((PyGenObject *)yf, args);
            gen->gi_running = 0;
        } else {
            PyObject *meth = _PyObject_GetAttrId(yf, &PyId_throw);
            if (meth == NULL) {
                if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
                    Py_DECREF(yf);
                    return NULL;
                }
                PyErr_Clear();
                Py_DECREF(yf);
                goto throw_here;
            }
            gen->gi_running = 1;
            ret = PyObject_CallObject(meth, args);
            gen->gi_running = 0;
            Py_DECREF(meth);
        }
        Py_DECREF(yf);
        if (!ret) {
            PyObject *val;
            /* Pop subiterator from stack */
            ret = *(--gen->gi_frame->f_stacktop);
            assert(ret == yf);
            Py_DECREF(ret);
            /* Termination repetition of YIELD_FROM */
            gen->gi_frame->f_lasti++;
            if (_PyGen_FetchStopIterationValue(&val) == 0) {
                ret = gen_send_ex(gen, val, 0);
                Py_DECREF(val);
            } else {
                ret = gen_send_ex(gen, Py_None, 1);
            }
        }
        return ret;
    }

throw_here:
    /* First, check the traceback argument, replacing None with
       NULL. */
    if (tb == Py_None) {
        tb = NULL;
    }
    else if (tb != NULL && !PyTraceBack_Check(tb)) {
        PyErr_SetString(PyExc_TypeError,
            "throw() third argument must be a traceback object");
        return NULL;
    }

    Py_INCREF(typ);
    Py_XINCREF(val);
    Py_XINCREF(tb);

    if (PyExceptionClass_Check(typ))
        PyErr_NormalizeException(&typ, &val, &tb);

    else if (PyExceptionInstance_Check(typ)) {
        /* Raising an instance.  The value should be a dummy. */
        if (val && val != Py_None) {
            PyErr_SetString(PyExc_TypeError,
              "instance exception may not have a separate value");
            goto failed_throw;
        }
        else {
            /* Normalize to raise <class>, <instance> */
            Py_XDECREF(val);
            val = typ;
            typ = PyExceptionInstance_Class(typ);
            Py_INCREF(typ);

            if (tb == NULL)
                /* Returns NULL if there's no traceback */
                tb = PyException_GetTraceback(val);
        }
    }
    else {
        /* Not something you can raise.  throw() fails. */
        PyErr_Format(PyExc_TypeError,
                     "exceptions must be classes or instances "
                     "deriving from BaseException, not %s",
                     Py_TYPE(typ)->tp_name);
            goto failed_throw;
    }

    PyErr_Restore(typ, val, tb);
    return gen_send_ex(gen, Py_None, 1);

failed_throw:
    /* Didn't use our arguments, so restore their original refcounts */
    Py_DECREF(typ);
    Py_XDECREF(val);
    Py_XDECREF(tb);
    return NULL;
}


static PyObject *
gen_iternext(PyGenObject *gen)
{
    return gen_send_ex(gen, NULL, 0);
}

/*
 *   If StopIteration exception is set, fetches its 'value'
 *   attribute if any, otherwise sets pvalue to None.
 *
 *   Returns 0 if no exception or StopIteration is set.
 *   If any other exception is set, returns -1 and leaves
 *   pvalue unchanged.
 */

int
_PyGen_FetchStopIterationValue(PyObject **pvalue) {
    PyObject *et, *ev, *tb;
    PyObject *value = NULL;

    if (PyErr_ExceptionMatches(PyExc_StopIteration)) {
        PyErr_Fetch(&et, &ev, &tb);
        if (ev) {
            /* exception will usually be normalised already */
            if (Py_TYPE(ev) == (PyTypeObject *) et
                || PyObject_IsInstance(ev, PyExc_StopIteration)) {
                value = ((PyStopIterationObject *)ev)->value;
                Py_INCREF(value);
                Py_DECREF(ev);
            } else if (et == PyExc_StopIteration) {
                /* avoid normalisation and take ev as value */
                value = ev;
            } else {
                /* normalisation required */
                PyErr_NormalizeException(&et, &ev, &tb);
                if (!PyObject_IsInstance(ev, PyExc_StopIteration)) {
                    PyErr_Restore(et, ev, tb);
                    return -1;
                }
                value = ((PyStopIterationObject *)ev)->value;
                Py_INCREF(value);
                Py_DECREF(ev);
            }
        }
        Py_XDECREF(et);
        Py_XDECREF(tb);
    } else if (PyErr_Occurred()) {
        return -1;
    }
    if (value == NULL) {
        value = Py_None;
        Py_INCREF(value);
    }
    *pvalue = value;
    return 0;
}

static PyObject *
gen_repr(PyGenObject *gen)
{
    return PyUnicode_FromFormat("<generator object %S at %p>",
                                gen->gi_qualname, gen);
}

static PyObject *
gen_get_name(PyGenObject *op)
{
    Py_INCREF(op->gi_name);
    return op->gi_name;
}

static int
gen_set_name(PyGenObject *op, PyObject *value)
{
    PyObject *tmp;

    /* Not legal to del gen.gi_name or to set it to anything
     * other than a string object. */
    if (value == NULL || !PyUnicode_Check(value)) {
        PyErr_SetString(PyExc_TypeError,
                        "__name__ must be set to a string object");
        return -1;
    }
    tmp = op->gi_name;
    Py_INCREF(value);
    op->gi_name = value;
    Py_DECREF(tmp);
    return 0;
}

static PyObject *
gen_get_qualname(PyGenObject *op)
{