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klib: Improve klist.h

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- Add `kl_shift_at` macro and backing function. This can be used to shift
  elements at arbitrary positions. `kl_shift` is now defined on top of the new
  macro.
- Change shift/push API, now `kl_push` accepts an object as parameter and
  `kl_shift` returns the object instead of a status. An assertion against
  shifting at the end of a list(or empty lists) was added.
- Add `kl_iter` and `kl_iter_at` macros. `kl_iter_at` is for starting the
  iteration at arbitrary positions.
This commit is contained in:
Thiago de Arruda 2015-05-20 08:06:48 -03:00
parent d6ed2b3a39
commit 4f5b250d4e
2 changed files with 27 additions and 15 deletions
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35
src/nvim/lib/klist.h
View File

@ -27,10 +27,12 @@
#define _AC_KLIST_H #define _AC_KLIST_H
#include <stdlib.h> #include <stdlib.h>
#include <assert.h>
#include "nvim/memory.h" #include "nvim/memory.h"
#include "nvim/func_attr.h" #include "nvim/func_attr.h"
#define KMEMPOOL_INIT(name, kmptype_t, kmpfree_f) \ #define KMEMPOOL_INIT(name, kmptype_t, kmpfree_f) \
typedef struct { \ typedef struct { \
size_t cnt, n, max; \ size_t cnt, n, max; \
@ -95,23 +97,27 @@
kmp_free(name, kl->mp, p); \ kmp_free(name, kl->mp, p); \
kmp_free(name, kl->mp, p); \ kmp_free(name, kl->mp, p); \
kmp_destroy(name, kl->mp); \ kmp_destroy(name, kl->mp); \
xfree(kl); \ xfree(kl); \
} \ } \
static inline kltype_t *kl_pushp_##name(kl_##name##_t *kl) { \ static inline void kl_push_##name(kl_##name##_t *kl, kltype_t d) { \
kl1_##name *q, *p = kmp_alloc(name, kl->mp); \ kl1_##name *q, *p = kmp_alloc(name, kl->mp); \
q = kl->tail; p->next = 0; kl->tail->next = p; kl->tail = p; \ q = kl->tail; p->next = 0; kl->tail->next = p; kl->tail = p; \
++kl->size; \ ++kl->size; \
return &q->data; \ q->data = d; \
} \ } \
static inline int kl_shift_##name(kl_##name##_t *kl, kltype_t *d) { \ static inline kltype_t kl_shift_at_##name(kl_##name##_t *kl, \
kl1_##name **n) { \
assert((*n)->next); \
kl1_##name *p; \ kl1_##name *p; \
if (kl->head->next == 0) return -1; \
--kl->size; \ --kl->size; \
p = kl->head; kl->head = kl->head->next; \ p = *n; \
if (d) *d = p->data; \ *n = (*n)->next; \
if (p == kl->head) kl->head = *n; \
kltype_t d = p->data; \
kmp_free(name, kl->mp, p); \ kmp_free(name, kl->mp, p); \
return 0; \ return d; \
} } \
#define kliter_t(name) kl1_##name #define kliter_t(name) kl1_##name
#define klist_t(name) kl_##name##_t #define klist_t(name) kl_##name##_t
@ -122,7 +128,14 @@
#define kl_init(name) kl_init_##name() #define kl_init(name) kl_init_##name()
#define kl_destroy(name, kl) kl_destroy_##name(kl) #define kl_destroy(name, kl) kl_destroy_##name(kl)
#define kl_pushp(name, kl) kl_pushp_##name(kl) #define kl_push(name, kl, d) kl_push_##name(kl, d)
#define kl_shift(name, kl, d) kl_shift_##name(kl, d) #define kl_shift_at(name, kl, node) kl_shift_at_##name(kl, node)
#define kl_shift(name, kl) kl_shift_at(name, kl, &kl->head)
#define kl_empty(kl) ((kl)->size == 0) #define kl_empty(kl) ((kl)->size == 0)
// Iteration macros. It's ok to modify the list while iterating as long as a
// `break` statement is executed before the next iteration.
#define kl_iter(name, kl, p) kl_iter_at(name, kl, p, NULL)
#define kl_iter_at(name, kl, p, h) \
for (kl1_##name *p = h ? h : kl->head; p != kl->tail; p = p->next)
#endif #endif

7
src/nvim/os/event.c
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@ -149,7 +149,7 @@ void event_push(Event event, bool deferred)
// returns(user hits a key for example). To avoid this scenario, we call // returns(user hits a key for example). To avoid this scenario, we call
// uv_stop when a event is enqueued. // uv_stop when a event is enqueued.
uv_stop(uv_default_loop()); uv_stop(uv_default_loop());
*kl_pushp(Event, deferred ? deferred_events : immediate_events) = event; kl_push(Event, deferred ? deferred_events : immediate_events, event);
} }
void event_process(void) void event_process(void)
@ -159,9 +159,8 @@ void event_process(void)
static void process_events_from(klist_t(Event) *queue) static void process_events_from(klist_t(Event) *queue)
{ {
Event event; while (!kl_empty(queue)) {
Event event = kl_shift(Event, queue);
while (kl_shift(Event, queue, &event) == 0) {
event.handler(event); event.handler(event);
} }
} }