transmission/libtransmission/watchdir-generic.c

115 lines
2.6 KiB
C

/*
* This file Copyright (C) 2015-2016 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <errno.h>
#include <event2/event.h>
#define LIBTRANSMISSION_WATCHDIR_MODULE
#include "transmission.h"
#include "log.h"
#include "ptrarray.h"
#include "tr-assert.h"
#include "utils.h"
#include "watchdir.h"
#include "watchdir-common.h"
/***
****
***/
#define log_error(...) \
(!tr_logLevelIsActive(TR_LOG_ERROR) ? (void)0 : \
tr_logAddMessage(__FILE__, __LINE__, TR_LOG_ERROR, "watchdir:generic", __VA_ARGS__))
/***
****
***/
typedef struct tr_watchdir_generic
{
tr_watchdir_backend base;
struct event* event;
tr_ptrArray dir_entries;
} tr_watchdir_generic;
#define BACKEND_UPCAST(b) ((tr_watchdir_generic*)(b))
/* Non-static and mutable for unit tests */
struct timeval tr_watchdir_generic_interval = { .tv_sec = 10, .tv_usec = 0 };
/***
****
***/
static void tr_watchdir_generic_on_event(evutil_socket_t fd, short type, void* context)
{
TR_UNUSED(fd);
TR_UNUSED(type);
tr_watchdir_t const handle = context;
tr_watchdir_generic* const backend = BACKEND_UPCAST(tr_watchdir_get_backend(handle));
tr_watchdir_scan(handle, &backend->dir_entries);
}
static void tr_watchdir_generic_free(tr_watchdir_backend* backend_base)
{
tr_watchdir_generic* const backend = BACKEND_UPCAST(backend_base);
if (backend == NULL)
{
return;
}
TR_ASSERT(backend->base.free_func == &tr_watchdir_generic_free);
if (backend->event != NULL)
{
event_del(backend->event);
event_free(backend->event);
}
tr_ptrArrayDestruct(&backend->dir_entries, &tr_free);
tr_free(backend);
}
tr_watchdir_backend* tr_watchdir_generic_new(tr_watchdir_t handle)
{
tr_watchdir_generic* backend;
backend = tr_new0(tr_watchdir_generic, 1);
backend->base.free_func = &tr_watchdir_generic_free;
if ((backend
->event = event_new(tr_watchdir_get_event_base(handle), -1, EV_PERSIST, &tr_watchdir_generic_on_event, handle)) ==
NULL)
{
log_error("Failed to create event: %s", tr_strerror(errno));
goto FAIL;
}
if (event_add(backend->event, &tr_watchdir_generic_interval) == -1)
{
log_error("Failed to add event: %s", tr_strerror(errno));
goto FAIL;
}
/* Run initial scan on startup */
event_active(backend->event, EV_READ, 0);
return BACKEND_DOWNCAST(backend);
FAIL:
tr_watchdir_generic_free(BACKEND_DOWNCAST(backend));
return NULL;
}