Correcting the connect callback in examples

Some examples were missed when changing the connect callback
signature in PR valkey-io#142 to using a non-const context.

Add -Werror to the examples Makefile to find issues in CI.
Can be disabled by USE_WERROR=0 as when building libvalkey.

Signed-off-by: Björn Svensson <[email protected]>

Author: bjosv

examples/Makefile

@@ -1,9 +1,15 @@
 CC?=gcc
 CXX?=g++
 
-CFLAGS?=-fPIC -Wall -Wextra -g -O2 -I../include
+WARNINGS=-Wall -Wextra
+CFLAGS?=-fPIC -g -O2 $(WARNINGS) -I../include
 STLIBNAME?=../lib/libvalkey.a
 
+USE_WERROR?=1
+ifeq ($(USE_WERROR),1)
+  WARNINGS+=-Werror
+endif
+
 # Define examples
 EXAMPLES=example-blocking example-blocking-push example-async-libevent \
 	 example-async-libev example-async-glib example-async-poll \

examples/async-ae.c

@@ -21,7 +21,7 @@ void getCallback(valkeyAsyncContext *c, void *r, void *privdata) {
     valkeyAsyncDisconnect(c);
 }
 
-void connectCallback(const valkeyAsyncContext *c, int status) {
+void connectCallback(valkeyAsyncContext *c, int status) {
     if (status != VALKEY_OK) {
         printf("Error: %s\n", c->errstr);
         aeStop(loop);

examples/async-ivykis.c

@@ -18,7 +18,7 @@ void getCallback(valkeyAsyncContext *c, void *r, void *privdata) {
     valkeyAsyncDisconnect(c);
 }
 
-void connectCallback(const valkeyAsyncContext *c, int status) {
+void connectCallback(valkeyAsyncContext *c, int status) {
     if (status != VALKEY_OK) {
         printf("Error: %s\n", c->errstr);
         return;

examples/async-macosx.c

@@ -48,7 +48,7 @@ void getCallback(valkeyAsyncContext *c, void *r, void *privdata) {
     valkeyAsyncDisconnect(c);
 }
 
-void connectCallback(const valkeyAsyncContext *c, int status) {
+void connectCallback(valkeyAsyncContext *c, int status) {
     if (status != VALKEY_OK) {
         printf("Error: %s\n", c->errstr);
         return;

examples/async-poll.c

@@ -21,7 +21,7 @@ void getCallback(valkeyAsyncContext *c, void *r, void *privdata) {
     valkeyAsyncDisconnect(c);
 }
 
-void connectCallback(const valkeyAsyncContext *c, int status) {
+void connectCallback(valkeyAsyncContext *c, int status) {
     if (status != VALKEY_OK) {
         printf("Error: %s\n", c->errstr);
         exit_loop = 1;

examples/async-valkeymoduleapi.c

@@ -32,7 +32,7 @@ void getCallback(valkeyAsyncContext *c, void *r, void *privdata) {
     valkeyAsyncCommand(c, debugCallback, NULL, "DEBUG SLEEP %f", 1.5);
 }
 
-void connectCallback(const valkeyAsyncContext *c, int status) {
+void connectCallback(valkeyAsyncContext *c, int status) {
     if (status != VALKEY_OK) {
         printf("Error: %s\n", c->errstr);
         return;