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rework hook list stuff again, and replace macros with real functins. We loose type safety but things are much cleaner now

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1234 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2006-08-13 01:43:34 +00:00
parent 2622b0ca9e
commit 281125c727
4 changed files with 150 additions and 97 deletions
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99
src/pulsecore/hook-list.h
View file

@ -22,11 +22,12 @@
USA.
***/
/* Some macro voodoo to implement a type safe hook list */
#include <pulsecore/llist.h>
#include <pulse/xmalloc.h>
#include <pulse/cdecl.h>
#include <pulsecore/gccmacro.h>
typedef struct pa_hook_slot pa_hook_slot;
typedef struct pa_hook pa_hook;
typedef enum pa_hook_result {
PA_HOOK_OK = 0,
@ -34,84 +35,28 @@ typedef enum pa_hook_result {
PA_HOOK_CANCEL = -1
} pa_hook_result_t;
#define PA_HOOK_DECLARE(name, arg1, arg2) \
typedef pa_hook_result_t (*pa_hook__##name##__func_t)(arg1 a, arg2 b, void *userdata); \
\
typedef struct pa_hook__##name##__func_info pa_hook__##name##__func_info; \
struct pa_hook__##name##__func_info { \
int dead; \
pa_hook__##name##__func_t func; \
void *userdata; \
PA_LLIST_FIELDS(pa_hook__##name##__func_info); \
}; \
PA_GCC_UNUSED static void pa_hook__##name##__free_one( \
pa_hook__##name##__func_info **head, \
pa_hook__##name##__func_info *i) { \
PA_LLIST_REMOVE(pa_hook__##name##__func_info, *head, i); \
pa_xfree(i); \
} \
PA_GCC_UNUSED static void pa_hook__##name##__free_all( \
pa_hook__##name##__func_info **head) { \
while (*head) \
pa_hook__##name##__free_one(head, *head); \
} \
PA_GCC_UNUSED static void pa_hook__##name##__mark_dead( \
pa_hook__##name##__func_info *i, \
pa_hook__##name##__func_t func, \
void *userdata) { \
for (; i; i = i->next) { \
if (i->func != func || i->userdata != userdata) \
continue; \
i->dead = 1; \
break; \
} \
} \
PA_GCC_UNUSED static void pa_hook__##name##__append( \
pa_hook__##name##__func_info **head, \
pa_hook__##name##__func_t func, \
void *userdata) { \
pa_hook__##name##__func_info *i = pa_xnew(pa_hook__##name##__func_info, 1); \
i->dead = 0; \
i->func = func; \
i->userdata = userdata; \
PA_LLIST_PREPEND(pa_hook__##name##__func_info, *head, i); \
} \
PA_GCC_UNUSED static pa_hook_result_t pa_hook__##name##__execute ( \
pa_hook__##name##__func_info **head, \
arg1 a, \
arg2 b) { \
pa_hook__##name##__func_info *i, *n; \
pa_hook_result_t ret = PA_HOOK_OK; \
for (i = *head; i; i = i->next) { \
if ((ret = i->func(a, b, i->userdata)) != PA_HOOK_OK) \
break; \
} \
for (i = *head; i; i = n) { \
n = i->next; \
if (i->dead) \
pa_hook__##name##__free_one(head, i); \
} \
return ret; \
}\
void pa_hook__##name##__nowarn(void)
typedef pa_hook_result_t (*pa_hook_cb_t)(void *data, void *userdata);
struct pa_hook_slot {
int dead;
pa_hook *hook;
pa_hook_cb_t callback;
void *userdata;
PA_LLIST_FIELDS(pa_hook_slot);
};
#define PA_HOOK_HEAD(name, head) \
pa_hook__##name##__func_info *head;
struct pa_hook {
PA_LLIST_HEAD(pa_hook_slot, slots);
pa_hook_slot *last;
int firing, n_dead;
};
#define PA_HOOK_HEAD_INIT(name, head) \
(head) = NULL
void pa_hook_init(pa_hook *hook);
void pa_hook_free(pa_hook *hook);
#define PA_HOOK_EXECUTE(name, head, arg1, arg2) \
pa_hook__##name##__execute(&(head), arg1, arg2)
pa_hook_slot* pa_hook_connect(pa_hook *hook, pa_hook_cb_t, void *userdata);
void pa_hook_slot_free(pa_hook_slot *slot);
#define PA_HOOK_APPEND(name, head, func, userdata) \
pa_hook__##name##__append(&(head), func, userdata)
#define PA_HOOK_REMOVE(name, head, func, userdata) \
pa_hook__##name##__mark_dead(head, func, userdata)
#define PA_HOOK_FREE(name, head) \
pa_hook__##name##__free_all(&(head))
pa_hook_result_t pa_hook_fire(pa_hook *hook, void *data);
#endif