Change server.daylight_active to an atomic variable

We are updating this variable in main thread, and the other
child threads can printing the logs at the same time.

Signed-off-by: Binbin <[email protected]>

src/server.c

@@ -131,10 +131,11 @@ void serverLogRaw(int level, const char *msg) {
         struct timeval tv;
         int role_char;
         pid_t pid = getpid();
+        int daylight_active = atomic_load_explicit(&server.daylight_active, memory_order_relaxed);
 
         gettimeofday(&tv, NULL);
         struct tm tm;
-        nolocks_localtime(&tm, tv.tv_sec, server.timezone, server.daylight_active);
+        nolocks_localtime(&tm, tv.tv_sec, server.timezone, daylight_active);
         off = strftime(buf, sizeof(buf), "%d %b %Y %H:%M:%S.", &tm);
         snprintf(buf + off, sizeof(buf) - off, "%03d", (int)tv.tv_usec / 1000);
         if (server.sentinel_mode) {
@@ -1091,7 +1092,7 @@ static inline void updateCachedTimeWithUs(int update_daylight_info, const long l
         struct tm tm;
         time_t ut = server.unixtime;
         localtime_r(&ut, &tm);
-        server.daylight_active = tm.tm_isdst;
+        atomic_store_explicit(&server.daylight_active, tm.tm_isdst, memory_order_relaxed);
     }
 }
 

src/server.h

@@ -2114,7 +2114,7 @@ struct valkeyServer {
     /* time cache */
     time_t unixtime;             /* Unix time sampled every cron cycle. */
     time_t timezone;             /* Cached timezone. As set by tzset(). */
-    int daylight_active;         /* Currently in daylight saving time. */
+    _Atomic int daylight_active; /* Currently in daylight saving time. */
     mstime_t mstime;             /* 'unixtime' in milliseconds. */
     ustime_t ustime;             /* 'unixtime' in microseconds. */
     mstime_t cmd_time_snapshot;  /* Time snapshot of the root execution nesting. */