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authoremersion <contact@emersion.fr>2018-07-22 20:17:51 +0100
committeremersion <contact@emersion.fr>2018-08-02 23:33:59 +0100
commit1705316fa759d528b0b19b1a13819d459da20a6a (patch)
treeb884cc1032e17364facab4706d19c3da3183c008
parent73b71118463d67581c2e2c38d263742ce35ec7d8 (diff)
gamma-control-v1: set O_NONBLOCK, improve error handling style
-rw-r--r--types/wlr_gamma_control_v1.c51
1 files changed, 34 insertions, 17 deletions
diff --git a/types/wlr_gamma_control_v1.c b/types/wlr_gamma_control_v1.c
index c347a13d..dfa52115 100644
--- a/types/wlr_gamma_control_v1.c
+++ b/types/wlr_gamma_control_v1.c
@@ -1,13 +1,14 @@
#include <assert.h>
+#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <wayland-server.h>
+#include <wlr/interfaces/wlr_output.h>
#include <wlr/types/wlr_gamma_control_v1.h>
#include <wlr/types/wlr_output.h>
-#include <wlr/interfaces/wlr_output.h>
#include <wlr/util/log.h>
-#include "wlr-gamma-control-unstable-v1-protocol.h"
#include "util/signal.h"
+#include "wlr-gamma-control-unstable-v1-protocol.h"
#define GAMMA_CONTROL_MANAGER_V1_VERSION 1
@@ -27,6 +28,12 @@ static void gamma_control_destroy(struct wlr_gamma_control_v1 *gamma_control) {
free(gamma_control);
}
+static void gamma_control_send_failed(
+ struct wlr_gamma_control_v1 *gamma_control) {
+ zwlr_gamma_control_v1_send_failed(gamma_control->resource);
+ gamma_control_destroy(gamma_control);
+}
+
static const struct zwlr_gamma_control_v1_interface gamma_control_impl;
static struct wlr_gamma_control_v1 *gamma_control_from_resource(
@@ -54,8 +61,7 @@ static void gamma_control_handle_set_gamma(struct wl_client *client,
struct wlr_gamma_control_v1 *gamma_control =
gamma_control_from_resource(gamma_control_resource);
if (gamma_control == NULL) {
- close(fd);
- return;
+ goto error_fd;
}
uint32_t ramp_size = wlr_output_get_gamma_size(gamma_control->output);
@@ -64,29 +70,34 @@ static void gamma_control_handle_set_gamma(struct wl_client *client,
off_t fd_size = lseek(fd, 0, SEEK_END);
// Skip checks if kernel does no support seek on buffer
if (fd_size != -1 && (size_t)fd_size != table_size) {
- close(fd);
wl_resource_post_error(gamma_control_resource,
ZWLR_GAMMA_CONTROL_V1_ERROR_INVALID_GAMMA,
"The gamma ramps don't have the correct size");
- return;
+ goto error_fd;
}
lseek(fd, 0, SEEK_SET);
+ int fd_flags = fcntl(fd, F_GETFL, 0);
+ if (fd_flags == -1) {
+ gamma_control_send_failed(gamma_control);
+ goto error_fd;
+ }
+ if (fcntl(fd, F_SETFL, fd_flags | O_NONBLOCK) == -1) {
+ gamma_control_send_failed(gamma_control);
+ goto error_fd;
+ }
+
// Use the heap since gamma tables can be large
uint16_t *table = malloc(table_size);
if (table == NULL) {
- close(fd);
wl_resource_post_no_memory(gamma_control_resource);
- return;
+ goto error_fd;
}
ssize_t n_read = read(fd, table, table_size);
- close(fd);
if (n_read == -1 || (size_t)n_read != table_size) {
- free(table);
- zwlr_gamma_control_v1_send_failed(gamma_control->resource);
- gamma_control_destroy(gamma_control);
- return;
+ gamma_control_send_failed(gamma_control);
+ goto error_table;
}
uint16_t *r = table;
@@ -94,12 +105,18 @@ static void gamma_control_handle_set_gamma(struct wl_client *client,
uint16_t *b = table + 2 * ramp_size;
bool ok = wlr_output_set_gamma(gamma_control->output, ramp_size, r, g, b);
- free(table);
if (!ok) {
- zwlr_gamma_control_v1_send_failed(gamma_control->resource);
- gamma_control_destroy(gamma_control);
- return;
+ gamma_control_send_failed(gamma_control);
+ goto error_table;
}
+
+ free(table);
+ return;
+
+error_table:
+ free(table);
+error_fd:
+ close(fd);
}
static const struct zwlr_gamma_control_v1_interface gamma_control_impl = {