171 lines
3.0 KiB
C
171 lines
3.0 KiB
C
#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifndef _MSC_VER
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# include <unistd.h>
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#endif
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#include <fcntl.h>
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#include <errno.h>
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#include "evas_common.h"
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#include "evas_private.h"
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static int _fd_write = -1;
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static int _fd_read = -1;
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static pid_t _fd_pid = 0;
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static int _init_evas_event = 0;
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typedef struct _Evas_Event_Async Evas_Event_Async;
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struct _Evas_Event_Async
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{
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const void *target;
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void *event_info;
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Evas_Async_Events_Put_Cb func;
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Evas_Callback_Type type;
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};
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int
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evas_async_events_init(void)
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{
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int filedes[2];
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_init_evas_event++;
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if (_init_evas_event > 1) return _init_evas_event;
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_fd_pid = getpid();
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if (pipe(filedes) == -1)
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{
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_init_evas_event = 0;
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return 0;
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}
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_fd_read = filedes[0];
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_fd_write = filedes[1];
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fcntl(_fd_read, F_SETFL, O_NONBLOCK);
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return _init_evas_event;
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}
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int
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evas_async_events_shutdown(void)
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{
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_init_evas_event--;
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if (_init_evas_event > 0) return _init_evas_event;
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close(_fd_read);
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close(_fd_write);
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_fd_read = -1;
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_fd_write = -1;
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return _init_evas_event;
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}
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static void
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_evas_async_events_fork_handle(void)
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{
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int i, count = _init_evas_event;
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if (getpid() == _fd_pid) return;
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for (i = 0; i < count; i++) evas_async_events_shutdown();
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for (i = 0; i < count; i++) evas_async_events_init();
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}
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EAPI int
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evas_async_events_fd_get(void)
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{
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_evas_async_events_fork_handle();
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return _fd_read;
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}
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EAPI int
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evas_async_events_process(void)
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{
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Evas_Event_Async *ev;
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int check;
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int count = 0;
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if (_fd_read == -1) return 0;
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_evas_async_events_fork_handle();
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do
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{
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check = read(_fd_read, &ev, sizeof (Evas_Event_Async *));
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if (check == sizeof (Evas_Event_Async *))
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{
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if (ev->func) ev->func((void *)ev->target, ev->type, ev->event_info);
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free(ev);
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count++;
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}
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}
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while (check > 0);
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evas_cache_image_wakeup();
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if (check < 0)
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{
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switch (errno)
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{
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case EBADF:
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case EINVAL:
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case EIO:
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case EISDIR:
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_fd_read = -1;
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}
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}
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return count;
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}
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EAPI Eina_Bool
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evas_async_events_put(const void *target, Evas_Callback_Type type, void *event_info, Evas_Async_Events_Put_Cb func)
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{
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Evas_Event_Async *ev;
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ssize_t check;
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Eina_Bool result = EINA_FALSE;
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if (!func) return 0;
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if (_fd_write == -1) return 0;
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_evas_async_events_fork_handle();
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ev = calloc(1, sizeof (Evas_Event_Async));
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if (!ev) return 0;
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ev->func = func;
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ev->target = target;
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ev->type = type;
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ev->event_info = event_info;
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do
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{
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check = write(_fd_write, &ev, sizeof (Evas_Event_Async*));
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}
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while ((check != sizeof (Evas_Event_Async*)) &&
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((errno == EINTR) || (errno == EAGAIN)));
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evas_cache_image_wakeup();
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if (check == sizeof (Evas_Event_Async*))
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result = EINA_TRUE;
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else
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{
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switch (errno)
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{
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case EBADF:
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case EINVAL:
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case EIO:
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case EPIPE:
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_fd_write = -1;
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}
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}
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return result;
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}
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