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authorMax Kellermann <max@duempel.org>2008-10-31 09:18:11 +0100
committerMax Kellermann <max@duempel.org>2008-10-31 09:18:11 +0100
commit94cbdffb7244603c8b47b7fea6cee1d8bb729aa1 (patch)
tree0c96f7aac942ce2a87675814c826b2265fc9870f
parent90e9079142f533c9a30f3431e03b49bbf4f73a77 (diff)
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client: use GQueue instead of sllist.h for deferred_send
Another custom data structore converted to GLib.
-rw-r--r--src/client.c76
1 files changed, 42 insertions, 34 deletions
diff --git a/src/client.c b/src/client.c
index 5ee336487..50f4a1ee8 100644
--- a/src/client.c
+++ b/src/client.c
@@ -22,7 +22,6 @@
#include "log.h"
#include "listen.h"
#include "permission.h"
-#include "sllist.h"
#include "utils.h"
#include "ioops.h"
#include "main_notify.h"
@@ -57,6 +56,11 @@ static size_t client_max_command_list_size =
static size_t client_max_output_buffer_size =
CLIENT_MAX_OUTPUT_BUFFER_SIZE_DEFAULT;
+struct deferred_buffer {
+ size_t size;
+ char data[sizeof(long)];
+};
+
struct client {
struct list_head siblings;
@@ -74,7 +78,7 @@ struct client {
GSList *cmd_list; /* for when in list mode */
int cmd_list_OK; /* print OK after each command execution */
size_t cmd_list_size; /* mem cmd_list consumes */
- struct sllnode *deferred_send; /* for output if client is slow */
+ GQueue *deferred_send; /* for output if client is slow */
size_t deferred_bytes; /* mem deferred_send consumes */
unsigned int num; /* client number */
@@ -138,7 +142,7 @@ static void client_init(struct client *client, int fd)
set_nonblocking(fd);
client->lastTime = time(NULL);
client->cmd_list = NULL;
- client->deferred_send = NULL;
+ client->deferred_send = g_queue_new();
client->deferred_bytes = 0;
client->num = next_client_num++;
client->send_buf_used = 0;
@@ -161,10 +165,15 @@ static void new_cmd_list_ptr(struct client *client, char *s)
client->cmd_list = g_slist_prepend(client->cmd_list, g_strdup(s));
}
-static void client_close(struct client *client)
+static void
+deferred_buffer_free(gpointer data, mpd_unused gpointer user_data)
{
- struct sllnode *buf;
+ struct deferred_buffer *buffer = data;
+ g_free(buffer);
+}
+static void client_close(struct client *client)
+{
assert(num_clients > 0);
assert(!list_empty(&clients));
list_del(&client->siblings);
@@ -177,14 +186,8 @@ static void client_close(struct client *client)
client->cmd_list = NULL;
}
- if ((buf = client->deferred_send)) {
- do {
- struct sllnode *prev = buf;
- buf = buf->next;
- free(prev);
- } while (buf);
- client->deferred_send = NULL;
- }
+ g_queue_foreach(client->deferred_send, deferred_buffer_free, NULL);
+ g_queue_free(client->deferred_send);
SECURE("client %i: closed\n", client->num);
free(client);
@@ -430,7 +433,8 @@ static void client_manager_register_read_fd(fd_set * fds, int *fdmax)
addListenSocketsToFdSet(fds, fdmax);
list_for_each_entry(client, &clients, siblings) {
- if (!client_is_expired(client) && !client->deferred_send) {
+ if (!client_is_expired(client) &&
+ g_queue_is_empty(client->deferred_send)) {
FD_SET(client->fd, fds);
if (*fdmax < client->fd)
*fdmax = client->fd;
@@ -446,7 +450,7 @@ static void client_manager_register_write_fd(fd_set * fds, int *fdmax)
list_for_each_entry(client, &clients, siblings) {
if (client->fd >= 0 && !client_is_expired(client)
- && client->deferred_send) {
+ && !g_queue_is_empty(client->deferred_send)) {
FD_SET(client->fd, fds);
if (*fdmax < client->fd)
*fdmax = client->fd;
@@ -594,12 +598,14 @@ void client_manager_expire(void)
static void client_write_deferred(struct client *client)
{
- struct sllnode *buf;
ssize_t ret = 0;
- buf = client->deferred_send;
- while (buf) {
+ while (!g_queue_is_empty(client->deferred_send)) {
+ struct deferred_buffer *buf =
+ g_queue_peek_head(client->deferred_send);
+
assert(buf->size > 0);
+ assert(buf->size <= client->deferred_bytes);
ret = write(client->fd, buf->data, buf->size);
if (ret < 0)
@@ -607,22 +613,21 @@ static void client_write_deferred(struct client *client)
else if ((size_t)ret < buf->size) {
assert(client->deferred_bytes >= (size_t)ret);
client->deferred_bytes -= ret;
- buf->data = (char *)buf->data + ret;
buf->size -= ret;
+ memmove(buf->data, buf->data + ret, buf->size);
} else {
- struct sllnode *tmp = buf;
- size_t decr = (buf->size + sizeof(struct sllnode));
+ size_t decr = sizeof(*buf) -
+ sizeof(buf->data) + buf->size;
assert(client->deferred_bytes >= decr);
client->deferred_bytes -= decr;
- buf = buf->next;
- free(tmp);
- client->deferred_send = buf;
+ free(buf);
+ g_queue_pop_head(client->deferred_send);
}
client->lastTime = time(NULL);
}
- if (!client->deferred_send) {
+ if (g_queue_is_empty(client->deferred_send)) {
DEBUG("client %i: buffer empty %lu\n", client->num,
(unsigned long)client->deferred_bytes);
assert(client->deferred_bytes == 0);
@@ -637,11 +642,13 @@ static void client_write_deferred(struct client *client)
static void client_defer_output(struct client *client,
const void *data, size_t length)
{
- struct sllnode **buf_r;
+ size_t alloc;
+ struct deferred_buffer *buf;
assert(length > 0);
- client->deferred_bytes += sizeof(struct sllnode) + length;
+ alloc = sizeof(*buf) - sizeof(buf->data) + length;
+ client->deferred_bytes += alloc;
if (client->deferred_bytes > client_max_output_buffer_size) {
ERROR("client %i: output buffer size (%lu) is "
"larger than the max (%lu)\n",
@@ -653,10 +660,11 @@ static void client_defer_output(struct client *client,
return;
}
- buf_r = &client->deferred_send;
- while (*buf_r != NULL)
- buf_r = &(*buf_r)->next;
- *buf_r = new_sllnode(data, length);
+ buf = g_malloc(alloc);
+ buf->size = length;
+ memcpy(buf->data, data, length);
+
+ g_queue_push_tail(client->deferred_send, buf);
}
static void client_write_direct(struct client *client,
@@ -665,7 +673,7 @@ static void client_write_direct(struct client *client,
ssize_t ret;
assert(length > 0);
- assert(client->deferred_send == NULL);
+ assert(g_queue_is_empty(client->deferred_send));
if ((ret = write(client->fd, data, length)) < 0) {
if (errno == EAGAIN || errno == EINTR) {
@@ -679,7 +687,7 @@ static void client_write_direct(struct client *client,
client_defer_output(client, data + ret, length - ret);
}
- if (client->deferred_send)
+ if (!g_queue_is_empty(client->deferred_send))
DEBUG("client %i: buffer created\n", client->num);
}
@@ -688,7 +696,7 @@ static void client_write_output(struct client *client)
if (client_is_expired(client) || !client->send_buf_used)
return;
- if (client->deferred_send != NULL)
+ if (!g_queue_is_empty(client->deferred_send))
client_defer_output(client, client->send_buf,
client->send_buf_used);
else