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1 #include <Python.h>
2 #include <semaphore.h>
3 
4 
5 static int
parse_sem_t(PyObject * object,void * address)6 parse_sem_t(PyObject *object, void *address)
7 {
8     *((sem_t **)address) = PyLong_AsVoidPtr(object);
9     return 1;
10 }
11 
12 
13 static PyObject *
namedsem_sem_open(PyObject * self,PyObject * args)14 namedsem_sem_open(PyObject *self, PyObject *args)
15 {
16     const char *name;
17     int oflag;
18     unsigned int value;
19     sem_t *result;
20 
21     PyArg_ParseTuple(args, "siI", &name, &oflag, &value);
22     result = sem_open(name, oflag, 0600, value);
23 
24     return PyLong_FromVoidPtr(result);
25 }
26 
27 static PyObject *
namedsem_sem_close(PyObject * self,PyObject * args)28 namedsem_sem_close(PyObject *self, PyObject *args)
29 {
30     sem_t *sem;
31     int result;
32 
33     PyArg_ParseTuple(args, "O&", &parse_sem_t, &sem);
34     result = sem_close(sem);
35 
36     return Py_BuildValue("i", result);
37 }
38 
39 static PyObject *
namedsem_sem_unlink(PyObject * self,PyObject * args)40 namedsem_sem_unlink(PyObject *self, PyObject *args)
41 {
42     const char *name;
43     int result;
44 
45     PyArg_ParseTuple(args, "s", &name);
46     result = sem_unlink(name);
47 
48     return Py_BuildValue("i", result);
49 }
50 
51 static PyObject *
namedsem_sem_wait(PyObject * self,PyObject * args)52 namedsem_sem_wait(PyObject *self, PyObject *args)
53 {
54     sem_t *sem;
55     int result;
56 
57     PyArg_ParseTuple(args, "O&", &parse_sem_t, &sem);
58     result = sem_wait(sem);
59 
60     return Py_BuildValue("i", result);
61 }
62 
63 static PyObject *
namedsem_sem_post(PyObject * self,PyObject * args)64 namedsem_sem_post(PyObject *self, PyObject *args)
65 {
66     sem_t *sem;
67     int result;
68 
69     PyArg_ParseTuple(args, "O&", &parse_sem_t, &sem);
70     result = sem_post(sem);
71 
72     return Py_BuildValue("i", result);
73 }
74 
75 
76 static PyObject *
namedsem_sem_getvalue(PyObject * self,PyObject * args)77 namedsem_sem_getvalue(PyObject *self, PyObject *args)
78 {
79     sem_t *sem;
80     int sval;
81 
82     PyArg_ParseTuple(args, "O&", &parse_sem_t, &sem);
83     sem_getvalue(sem, &sval);
84 
85     return Py_BuildValue("i", sval);
86 }
87 
88 
89 
90 static PyMethodDef NamedsemMethods[] = {
91     {"sem_open", namedsem_sem_open, METH_VARARGS, "Execute sem_open()."},
92     {"sem_close", namedsem_sem_close, METH_VARARGS, "Execute sem_close()."},
93     {"sem_unlink", namedsem_sem_unlink, METH_VARARGS, "Execute sem_unlink()."},
94     {"sem_wait", namedsem_sem_wait, METH_VARARGS, "Execute sem_wait()."},
95     {"sem_post", namedsem_sem_post, METH_VARARGS, "Execute sem_post()."},
96     {"sem_getvalue", namedsem_sem_getvalue, METH_VARARGS, "Execute sem_getvalue()."},
97     {NULL, NULL, 0, NULL}
98 };
99 
100 PyMODINIT_FUNC
initnamedsem(void)101 initnamedsem(void) {
102     PyObject *module;
103 
104     module = Py_InitModule("namedsem", NamedsemMethods);
105     PyModule_AddIntConstant(module, "SEM_FAILED", (long)SEM_FAILED);
106 }
107