include/linux/delayed_call.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _DELAYED_CALL_H
   3 #define _DELAYED_CALL_H
   4
   5 /*
   6  * Poor man's closures; I wish we could've done them sanely polymorphic,
   7  * but...
   8  */
   9
  10 struct delayed_call {
  11         void (*fn)(void *);
  12         void *arg;
  13 };
  14
  15 #define DEFINE_DELAYED_CALL(name) struct delayed_call name = {NULL, NULL}
  16
  17 /* I really wish we had closures with sane typechecking... */
  18 static inline void set_delayed_call(struct delayed_call *call,
  19                 void (*fn)(void *), void *arg)
  20 {
  21         call->fn = fn;
  22         call->arg = arg;
  23 }
  24
  25 static inline void do_delayed_call(struct delayed_call *call)
  26 {
  27         if (call->fn)
  28                 call->fn(call->arg);
  29 }
  30
  31 static inline void clear_delayed_call(struct delayed_call *call)
  32 {
  33         call->fn = NULL;
  34 }
  35 #endif