#define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
+static inline int negative_errno(void) {
+ /* This helper should be used to shut up gcc if you know 'errno' is
+ * negative. Instead of "return -errno;", use "return negative_errno();"
+ * It will suppress bogus gcc warnings in case it assumes 'errno' might
+ * be 0 and thus the caller's error-handling might not be triggered. */
+ assert_return(errno > 0, -EINVAL);
+ return -errno;
+}
+
struct _umask_struct_ {
mode_t mask;
bool quit;
return __SIZEOF_INT__ * 8 - __builtin_clz(x) - 1;
}
+static inline unsigned log2u(unsigned x) {
+ assert(x > 0);
+
+ return sizeof(unsigned) * 8 - __builtin_clz(x) - 1;
+}
+
+static inline unsigned log2u_round_up(unsigned x) {
+ assert(x > 0);
+
+ if (x == 1)
+ return 0;
+
+ return log2u(x - 1) + 1;
+}
+
static inline bool logind_running(void) {
return access("/run/systemd/seats/", F_OK) >= 0;
}