LXR qemu/include/qemu/module.h

   1/*
   2 * QEMU Module Infrastructure
   3 *
   4 * Copyright IBM, Corp. 2009
   5 *
   6 * Authors:
   7 *  Anthony Liguori   <aliguori@us.ibm.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2.  See
  10 * the COPYING file in the top-level directory.
  11 *
  12 */
  13
  14#ifndef QEMU_MODULE_H
  15#define QEMU_MODULE_H
  16
  17#include "qemu/osdep.h"
  18
  19#define DSO_STAMP_FUN         glue(qemu_stamp, CONFIG_STAMP)
  20#define DSO_STAMP_FUN_STR     stringify(DSO_STAMP_FUN)
  21
  22#ifdef BUILD_DSO
  23void DSO_STAMP_FUN(void);
  24/* This is a dummy symbol to identify a loaded DSO as a QEMU module, so we can
  25 * distinguish "version mismatch" from "not a QEMU module", when the stamp
  26 * check fails during module loading */
  27void qemu_module_dummy(void);
  28
  29#define module_init(function, type)                                         \
  30static void __attribute__((constructor)) do_qemu_init_ ## function(void)    \
  31{                                                                           \
  32    register_dso_module_init(function, type);                               \
  33}
  34#else
  35/* This should not be used directly.  Use block_init etc. instead.  */
  36#define module_init(function, type)                                         \
  37static void __attribute__((constructor)) do_qemu_init_ ## function(void)    \
  38{                                                                           \
  39    register_module_init(function, type);                                   \
  40}
  41#endif
  42
  43typedef enum {
  44    MODULE_INIT_BLOCK,
  45    MODULE_INIT_MACHINE,
  46    MODULE_INIT_QAPI,
  47    MODULE_INIT_QOM,
  48    MODULE_INIT_MAX
  49} module_init_type;
  50
  51#define block_init(function) module_init(function, MODULE_INIT_BLOCK)
  52#define machine_init(function) module_init(function, MODULE_INIT_MACHINE)
  53#define qapi_init(function) module_init(function, MODULE_INIT_QAPI)
  54#define type_init(function) module_init(function, MODULE_INIT_QOM)
  55
  56void register_module_init(void (*fn)(void), module_init_type type);
  57void register_dso_module_init(void (*fn)(void), module_init_type type);
  58
  59void module_call_init(module_init_type type);
  60
  61#endif
  62