cffi_builder_sysv.py

import os.path

import cffi

ffibuilder = cffi.FFI()

ffibuilder.cdef(
    r'''
    typedef enum {
        SYSVMQ_OK,
        SYSVMQ_E,
        SYSVMQ_E_VALUE,
        SYSVMQ_E_PERMISSIONS,
        SYSVMQ_E_RESOURCES,
        SYSVMQ_E_DESCRIPTOR,
        SYSVMQ_E_SIGNAL,
        SYSVMQ_E_SIZE,
        SYSVMQ_E_FULL,
        SYSVMQ_E_EMPTY,
    } SysVMqResult;

    typedef struct {
        size_t size;
        size_t max_bytes;
    } SysVMqAttr;

    SysVMqResult sysvmq_open(const unsigned int key, int * const mq);

    SysVMqResult sysvmq_close(const int mq);

    SysVMqResult sysvmq_put(const int mq, const char * const msg,
            const size_t msg_size, const long msg_type,
            const double timeout);

    SysVMqResult sysvmq_get(const int mq, char * const buffer,
            size_t * const size, const long msg_type,
            const double timeout);

    SysVMqResult sysvmq_get_attr(const int mq, SysVMqAttr * const attr);

    SysVMqResult sysvmq_set_max_bytes(const int mq, const size_t max_bytes);
    '''
)

ffibuilder.set_source(
    'ipcqueue._sysvmq',
    '#include "ipcqueue/sysvmq.h"',
    sources=['ipcqueue/sysvmq.c'],
    extra_compile_args=[
        '-I{}'.format(os.path.abspath(os.path.dirname(__file__))),
    ],
    libraries=[]
)