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notify/inotify.c: first change, uses queue

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This commit is contained in:
Henrik Hautakoski 2010-09-26 14:53:14 +02:00
parent dd73cf9422
commit c6f346586e
3 changed files with 83 additions and 104 deletions
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4
Makefile
View file

@ -7,7 +7,7 @@ CFLAGS = -O2 -Werror
LDFLAGS =
ifdef DEBUG
CFLAGS += -g -D__DEBUG__
CFLAGS += -g -D__DEBUG__
endif
ifndef V
@ -20,7 +20,6 @@ FINDOBJ = find . -name "*.o" -type f -printf "%P\n"
BUILD := ./build
PROGRAM := $(BUILD)/arch
ifeq ($(output), mysql)
CFLAGS += `mysql_config --cflags`
LDFLAGS += -L/usr/lib/mysql -lmysqlclient
@ -44,6 +43,7 @@ obj += src/output/$(output).o
obj += src/notify/inotify.o
obj += src/notify/event.o
obj += src/notify/tree.o
obj += src/notify/queue.o
obj += src/indexer.o
obj += src/arch.o

182
src/notify/inotify.c
View file

@ -9,55 +9,44 @@
* (at your option) any later version.
*/
#include "notify.h"
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/ioctl.h>
#include <sys/inotify.h>
#include "../common/util.h"
/* red black tree for watch descriptors */
#include "../common/rbtree.h"
#include "../common/debug.h"
#include "../common/path.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/inotify.h>
#include "queue.h"
#include "notify.h"
typedef struct inotify_event inoev;
#define MAXEVENT 0x200
#define PADEVSIZE (sizeof(inoev) + 0x40)
#define INOBUFSIZE (MAXEVENT*PADEVSIZE)
#define INOBUFSIZE ((1 << 12) * (sizeof(inoev) + 0x40))
#define WATCH_MASK (IN_MOVE | IN_CREATE | IN_DELETE | IN_ONLYDIR)
/* Inotify file descriptor */
static int fd = 0;
/* Available bytes on file descriptor */
static unsigned int fd_bytes = 0;
/* redblack tree */
static rbtree tree;
/* inotify queue buffer */
static char *inobuf = NULL;
/* current event */
static notify_event event;
static queue_t event_queue;
static int addwatch(const char *path, const char *name) {
rbnode *node;
char *cpath;
int wd;
cpath = path_normalize(path, name, 1);
if (cpath == NULL)
return -1;
wd = inotify_add_watch(fd, cpath, WATCH_MASK);
if (wd < 0) {
@ -94,14 +83,14 @@ static int rmwatch(unsigned int wd) {
return 1;
}
static int proc_event(inoev *iev) {
static void proc_event(inoev *iev) {
rbnode *node;
notify_event *event;
char buf[4096];
uint8_t type = NOTIFY_UNKNOWN;
if (iev == NULL)
return 0;
event = notify_event_new();
#ifdef __DEBUG__
fprintf(stderr, "RAW EVENT: %i, %x", iev->wd, iev->mask);
@ -116,14 +105,14 @@ static int proc_event(inoev *iev) {
if (node == NULL) {
dprint("-- IGNORING EVENT -- invalid watchdescriptor %i\n", iev->wd);
return 0;
goto cleanup;
}
notify_event_set_dir(&event, (iev->mask & IN_ISDIR) != 0);
notify_event_set_dir(event, (iev->mask & IN_ISDIR) != 0);
/* set path, this is stored in void* node->data */
notify_event_set_path(&event, (char*)node->data);
notify_event_set_filename(&event, iev->name);
notify_event_set_path(event, (char*)node->data);
notify_event_set_filename(event, iev->name);
iev->mask &= ~IN_ISDIR;
@ -131,37 +120,40 @@ static int proc_event(inoev *iev) {
case IN_CREATE :
if (event.dir) {
if (event->dir) {
dprint("IN_CREATE on directory, adding\n");
addwatch(event.path, event.filename);
addwatch(event->path, event->filename);
}
type = NOTIFY_CREATE;
break;
case IN_MOVED_TO :
if (event.dir) {
if (event->dir) {
dprint("IN_MOVED_TO on directory, adding\n");
addwatch(event.path, event.filename);
addwatch(event->path, event->filename);
}
type = NOTIFY_MOVE_TO;
break;
case IN_MOVED_FROM :
/* TODO: clean this */
sprintf(buf, "%s%s/", event.path, event.filename);
sprintf(buf, "%s%s/", event->path, event->filename);
notify_rm_watch(buf);
case IN_DELETE :
type = NOTIFY_DELETE;
break;
case IN_IGNORED :
rmwatch(iev->wd);
return 0;
goto cleanup;
}
notify_event_set_type(&event, type);
return 1;
notify_event_set_type(event, type);
queue_enqueue(event_queue, event);
return;
cleanup:
free(event);
}
int notify_init() {
@ -177,13 +169,11 @@ int notify_init() {
perror("NOTIFY INIT");
return -1;
}
dprint("inotify descriptor = %i\n", fd);
inobuf = malloc(INOBUFSIZE);
event_queue = queue_init();
if (inobuf == NULL) {
perror("NOTIFY BUFFER");
if (event_queue == NULL) {
perror("EVENT QUEUE");
return -1;
}
@ -191,16 +181,16 @@ int notify_init() {
}
void notify_cleanup() {
fd = 0;
/* free rbtree */
rbtree_free(&tree, NULL);
if (inobuf != NULL) {
free(inobuf);
inobuf = NULL;
if (event_queue) {
queue_destroy(event_queue);
event_queue = NULL;
}
fd = 0;
}
/*
@ -225,45 +215,48 @@ int notify_rm_watch(const char *path) {
return 0;
}
/*
* Get next inotify event
*/
notify_event* notify_read() {
int rc;
inoev *rev = NULL;
static int offset;
while(! proc_event(rev)) {
if (fd_bytes < 1) {
offset = 0;
char buf[INOBUFSIZE];
fd_bytes = read(fd, inobuf, INOBUFSIZE);
if (fd_bytes < 1) {
if (fd_bytes == 0) {
fprintf(stderr, "NOTIFY READ: EOF\n");
}
/* EINTR = call interrupted, silent ignore */
else if (errno != EINTR) {
perror("NOTIFY READ");
}
return NULL;
}
}
rev = (inoev *) &inobuf[offset];
offset += sizeof(inoev) + rev->len;
if (offset >= fd_bytes)
fd_bytes = 0;
}
return &event;
/* time resolution */
struct timespec tres = { 0, 2000000 };
unsigned short tcount;
/* bytes ready on the inotify descriptor */
int ioready;
for(tcount = 0; tcount < 10; tcount++) {
if (ioctl(fd, FIONREAD, &ioready) == -1)
break;
if (ioready > INOBUFSIZE)
break;
nanosleep(&tres, NULL);
}
/* read if we have data on fd */
while(ioready > 0) {
dprint("%i bytes avail\n", ioready);
int offset = 0, rbytes = read(fd, buf, INOBUFSIZE);
if (rbytes == -1)
die_errno("INOTIFY");
while(rbytes > offset) {
inoev *rev = (inoev *) &buf[offset];
proc_event(rev);
offset += sizeof(inoev) + rev->len;
}
ioready -= rbytes;
}
return queue_dequeue(event_queue);
}
static void print_node(rbnode *node) {
@ -276,18 +269,3 @@ void notify_stat() {
rbtree_walk(&tree, print_node);
#endif
}
int notify_is_ready() {
unsigned int bytes;
if (fd_bytes > 1)
return 1;
if (ioctl(fd, FIONREAD, &bytes) == -1)
return 0;
dprint("%i bytes ready!\n", bytes);
return bytes > 512;
}

1
test/Makefile
View file

@ -40,6 +40,7 @@ inotify :
../src/common/path.c \
../src/notify/event.c \
../src/notify/tree.c \
../src/notify/queue.c \
../src/notify/inotify.c \
t_inotify.c -o test_inotify