harbour-books/app/stubs/libudev.c
Slava Monich 4a4a78e769 [harbour-lib] Pulled in HarbourLib updates
Now this code has a chance to work on a 64-bit system
2020-09-15 17:55:20 +03:00

123 lines
4.4 KiB
C

/*
* Copyright (C) 2015-2020 Jolla Ltd.
* Copyright (C) 2015-2020 Slava Monich <slava.monich@jolla.com>
*
* You may use this file under the terms of the BSD license as follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <libudev.h>
#include <stdlib.h>
#include <dlfcn.h>
#include "HarbourSystem.h"
#define LIBUDEV_FUNCTIONS(f) \
f(struct udev*, udev_unref,\
(struct udev* udev), \
(udev)) \
f(struct udev_monitor*, udev_monitor_new_from_netlink, \
(struct udev* udev, const char* name), \
(udev, name)) \
f(struct udev_device*, udev_monitor_receive_device, \
(struct udev_monitor* mon), \
(mon)) \
f(int, udev_monitor_filter_add_match_subsystem_devtype, \
(struct udev_monitor* mon, const char* sub, const char* dev), \
(mon, sub, dev)) \
f(int, udev_monitor_enable_receiving, \
(struct udev_monitor* mon), \
(mon)) \
f(int, udev_monitor_get_fd, \
(struct udev_monitor* mon), \
(mon)) \
f(struct udev_monitor*, udev_monitor_unref, \
(struct udev_monitor* mon), \
(mon)) \
f(const char*, udev_device_get_devnode, \
(struct udev_device* dev), \
(dev)) \
f(const char*, udev_device_get_devpath, \
(struct udev_device* dev), \
(dev)) \
f(const char*, udev_device_get_subsystem, \
(struct udev_device* dev), \
(dev)) \
f(const char*, udev_device_get_devtype, \
(struct udev_device* dev), \
(dev)) \
f(const char*, udev_device_get_action, \
(struct udev_device* dev), \
(dev)) \
f(struct udev_device*, udev_device_unref, \
(struct udev_device* dev), \
(dev))
#define LIBUDEV_NUM_FUNCTIONS (sizeof(libudev_names)/sizeof(libudev_names[0]))
#define LIBUDEV_NO_HANDLE ((void*)-1)
#define LIBUDEV_SO "libudev.so.1"
static const char* libudev_names[] = {
"udev_new",
#define FN_NAME(ret,name,params,args) #name,
LIBUDEV_FUNCTIONS(FN_NAME)
};
static struct {
void* handle;
union {
struct libudev_proc {
struct udev* (*udev_new)(void);
#define FN_POINTER(ret,name,params,args) ret (* name) params;
LIBUDEV_FUNCTIONS(FN_POINTER)
} udev;
void* entry[LIBUDEV_NUM_FUNCTIONS];
} fn;
} libudev;
/* udev_new() is the special function where we load the library */
struct udev*
udev_new()
{
if (!libudev.handle) {
libudev.handle = HarbourDlopen(LIBUDEV_SO, RTLD_LAZY);
if (libudev.handle) {
unsigned int i;
for (i=0; i<LIBUDEV_NUM_FUNCTIONS; i++) {
libudev.fn.entry[i] = dlsym(libudev.handle, libudev_names[i]);
}
} else {
libudev.handle = LIBUDEV_NO_HANDLE;
}
}
return libudev.fn.udev.udev_new ? libudev.fn.udev.udev_new() : NULL;
}
/* All other wrappers are generated by the preprocessor */
#define FN_IMPL(ret,name,params,args) ret name params \
{ return libudev.fn.udev.name ? libudev.fn.udev.name args : 0; }
LIBUDEV_FUNCTIONS(FN_IMPL)