macro: don't redefine CLAMP if it is already defined by glib or some other library

[elogind.git] / src / shared / macro.h

diff --git a/src/shared/macro.h b/src/shared/macro.h
index dbdf5b3fb00f2d83362ab9bd5f97f9cc699b64b4..e5c33ce5617653861dc9f53acae848709c75a864 100644 (file)
--- a/src/shared/macro.h
+++ b/src/shared/macro.h
@@ -92,6 +92,7 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
 #define MIN3(a,b,c)                             \
         MIN(MIN(a,b),c)
 
+#ifndef CLAMP
 #define CLAMP(x, low, high)                                             \
         __extension__ ({                                                \
                         typeof(x) _x = (x);                             \
@@ -99,6 +100,7 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
                         typeof(high) _high = (high);                    \
                         ((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
                 })
+#endif
 
 #define assert_se(expr)                                                 \
         do {                                                            \
@@ -119,14 +121,21 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
                 log_assert_failed_unreachable(t, __FILE__, __LINE__, __PRETTY_FUNCTION__); \
         } while (false)
 
-#define assert_cc(expr)                            \
-        do {                                       \
-                switch (0) {                       \
-                        case 0:                    \
-                        case !!(expr):             \
-                                ;                  \
-                }                                  \
+#if defined(static_assert)
+#define assert_cc(expr)                         \
+        do {                                    \
+                static_assert(expr, #expr);     \
+        } while (false)
+#else
+#define assert_cc(expr)                         \
+        do {                                    \
+                switch (0) {                    \
+                case 0:                         \
+                case !!(expr):                  \
+                        ;                       \
+                }                               \
         } while (false)
+#endif
 
 #define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
 #define UINT_TO_PTR(u) ((void*) ((uintptr_t) (u)))
@@ -189,9 +198,14 @@ static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
 
 #define _cleanup_free_ __attribute__((cleanup(freep)))
 #define _cleanup_fclose_ __attribute__((cleanup(fclosep)))
+#define _cleanup_pclose_ __attribute__((cleanup(pclosep)))
 #define _cleanup_close_ __attribute__((cleanup(closep)))
 #define _cleanup_closedir_ __attribute__((cleanup(closedirp)))
 #define _cleanup_umask_ __attribute__((cleanup(umaskp)))
+#define _cleanup_set_free_ __attribute__((cleanup(set_freep)))
+#define _cleanup_set_free_free_ __attribute__((cleanup(set_free_freep)))
+#define _cleanup_strv_free_ __attribute__((cleanup(strv_freep)))
+#define _cleanup_journal_close_ __attribute__((cleanup(journal_closep)))
 
 #define VA_FORMAT_ADVANCE(format, ap)                                   \
 do {                                                                    \