C_Python不释放缓冲区内存
我正在为python编写C代码(python C API),我注意到python没有释放文件的内存,我想知道问题是否出在我的代码中。 我想尽量简化,但我希望不会遗漏任何细节。 该文件是带有缓冲区的二进制文件,前4个字节是缓冲区大小,然后是缓冲区。C_Python不释放缓冲区内存,python,c,python-3.x,python-c-api,Python,C,Python 3.x,Python C Api,我正在为python编写C代码(python C API),我注意到python没有释放文件的内存,我想知道问题是否出在我的代码中。 我想尽量简化,但我希望不会遗漏任何细节。 该文件是带有缓冲区的二进制文件,前4个字节是缓冲区大小,然后是缓冲区。 二进制文件(big_file.comp): python代码(test.py): 一些C代码简化了: #include <Python.h> #include "structmember.h" typedef struct { P
二进制文件(big_file.comp): python代码(test.py): 一些C代码简化了:
#include <Python.h>
#include "structmember.h"
typedef struct {
PyObject_HEAD
uint32_t arr_size;
} DecompressObject;
static int Decompress_init(DecompressObject *self, PyObject *args, PyObject *kwds){
return 0;
}
static PyObject* Decompress_handle_buffer(DecompressObject* self, PyObject* args){
uint32_t buf_size = 0;
uint8_t *buf = NULL;
// get buffer and buffer length from python function
if(!PyArg_ParseTuple(args, "y*i", &buf, &buf_size)){
PyErr_SetString(PyExc_Exception, "Failed to parse function arguments");
return NULL;
}
self->arr_size = 10;
Py_XINCREF(self);
return (PyObject *) self;
}
static PyObject* Decompress_next(DecompressObject *self, PyObject *Py_UNUSED(ignored)){
static uint32_t seq_index = 0;
if (seq_index < self->arr_size) {
seq_index++;
Py_RETURN_NONE;
}
seq_index = 0;
return NULL;
}
static void Decompress_dealloc(DecompressObject *self){
Py_TYPE(self)->tp_free((PyObject *) self);
}
static PyMethodDef Decompress_methods[] = {
{"decompress_buffer", (PyCFunction) Decompress_handle_buffer, METH_VARARGS, "Decompress a buffer to asc data."},
{NULL} /* Sentinel */
};
static PyTypeObject DecompressType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "decomplib.Decompress",
.tp_doc = "Decompress object",
.tp_basicsize = sizeof(DecompressObject),
.tp_itemsize = 0,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_alloc = PyType_GenericAlloc,
.tp_new = PyType_GenericNew,
.tp_iter = PyObject_SelfIter,
.tp_init = (initproc) Decompress_init,
.tp_dealloc = (destructor) Decompress_dealloc,
.tp_iternext = (iternextfunc) Decompress_next,
.tp_methods = Decompress_methods,
};
static PyModuleDef Decompressmodule = {
PyModuleDef_HEAD_INIT,
.m_name = "decomplib",
.m_doc = "Decompress an compressed file.",
.m_size = -1,
};
PyMODINIT_FUNC PyInit_decomplib(void){
PyObject *d;
if (PyType_Ready(&DecompressType) < 0)
return NULL;
d = PyModule_Create(&Decompressmodule);
if (d == NULL)
return NULL;
Py_INCREF(&DecompressType);
if (PyModule_AddObject(d, "Decompress", (PyObject *) &DecompressType) < 0) {
Py_DECREF(&DecompressType);
Py_DECREF(d);
return NULL;
}
return d;
}
在玩游戏的时候,我注意到,如果我将C
函数解压\u handle\u buffer
中对函数PyArg\u ParseTuple
的调用从“y*I”
更改为“Si”
,Python会清理内存
./test.py -f ~/Desktop/TEST_CAN_OPT/big_fie.comp
None
None
None
...
None
None
None
pmem(rss=22577152, vms=84869120, shared=6361088, text=2867200, lib=0, data=16420864, dirty=0)
但是,缓冲区未正确读取。有什么想法吗?! 额外信息:
y*
与您正在使用的uint8\t
不一致。如中所述,它将填充您应该提供的结构
您需要实际提供一个Py_缓冲区,当您使用完后,您需要释放缓冲区。非常感谢,我不知道我怎么会错过它。
#include <Python.h>
#include "structmember.h"
typedef struct {
PyObject_HEAD
uint32_t arr_size;
} DecompressObject;
static int Decompress_init(DecompressObject *self, PyObject *args, PyObject *kwds){
return 0;
}
static PyObject* Decompress_handle_buffer(DecompressObject* self, PyObject* args){
uint32_t buf_size = 0;
uint8_t *buf = NULL;
// get buffer and buffer length from python function
if(!PyArg_ParseTuple(args, "y*i", &buf, &buf_size)){
PyErr_SetString(PyExc_Exception, "Failed to parse function arguments");
return NULL;
}
self->arr_size = 10;
Py_XINCREF(self);
return (PyObject *) self;
}
static PyObject* Decompress_next(DecompressObject *self, PyObject *Py_UNUSED(ignored)){
static uint32_t seq_index = 0;
if (seq_index < self->arr_size) {
seq_index++;
Py_RETURN_NONE;
}
seq_index = 0;
return NULL;
}
static void Decompress_dealloc(DecompressObject *self){
Py_TYPE(self)->tp_free((PyObject *) self);
}
static PyMethodDef Decompress_methods[] = {
{"decompress_buffer", (PyCFunction) Decompress_handle_buffer, METH_VARARGS, "Decompress a buffer to asc data."},
{NULL} /* Sentinel */
};
static PyTypeObject DecompressType = {
PyVarObject_HEAD_INIT(NULL, 0)
.tp_name = "decomplib.Decompress",
.tp_doc = "Decompress object",
.tp_basicsize = sizeof(DecompressObject),
.tp_itemsize = 0,
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.tp_alloc = PyType_GenericAlloc,
.tp_new = PyType_GenericNew,
.tp_iter = PyObject_SelfIter,
.tp_init = (initproc) Decompress_init,
.tp_dealloc = (destructor) Decompress_dealloc,
.tp_iternext = (iternextfunc) Decompress_next,
.tp_methods = Decompress_methods,
};
static PyModuleDef Decompressmodule = {
PyModuleDef_HEAD_INIT,
.m_name = "decomplib",
.m_doc = "Decompress an compressed file.",
.m_size = -1,
};
PyMODINIT_FUNC PyInit_decomplib(void){
PyObject *d;
if (PyType_Ready(&DecompressType) < 0)
return NULL;
d = PyModule_Create(&Decompressmodule);
if (d == NULL)
return NULL;
Py_INCREF(&DecompressType);
if (PyModule_AddObject(d, "Decompress", (PyObject *) &DecompressType) < 0) {
Py_DECREF(&DecompressType);
Py_DECREF(d);
return NULL;
}
return d;
}
./test.py -f ~/Desktop/TEST_CAN_OPT/big_fie.comp
None
None
None
...
None
None
None
pmem(rss=4349915136, vms=4412583936, shared=6270976, text=2867200, lib=0, data=4344135680, dirty=0)
./test.py -f ~/Desktop/TEST_CAN_OPT/big_fie.comp
None
None
None
...
None
None
None
pmem(rss=22577152, vms=84869120, shared=6361088, text=2867200, lib=0, data=16420864, dirty=0)