fix: clock_gettime on macOs

Newer version of macOs have an implementation of clock_gettime() that
requires additionnal setup, move the platform specific code first so it
is always used.

Change-Id: I12fcdeff6c0ae59bc1a13f4e2cd7f4ebcedfc253
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/include/urcu/arch/generic.h b/include/urcu/arch/generic.h
index 4b56ed7aaff00788a5fb4fbce712a146c5198a5d..be6e41e24d88a40f16d07ae08d7d391aeb650821 100644 (file)
--- a/include/urcu/arch/generic.h
+++ b/include/urcu/arch/generic.h
@@ -153,8 +153,11 @@ extern "C" {
 #ifndef HAS_CAA_GET_CYCLES
 #define HAS_CAA_GET_CYCLES
 
-#ifdef CONFIG_RCU_HAVE_CLOCK_GETTIME
+#if defined(__APPLE__)
 
+#include <mach/mach.h>
+#include <mach/clock.h>
+#include <mach/mach_time.h>
 #include <time.h>
 #include <stdint.h>
 
@@ -162,18 +165,21 @@ typedef uint64_t caa_cycles_t;
 
 static inline caa_cycles_t caa_get_cycles (void)
 {
-       struct timespec ts;
+       mach_timespec_t ts = { 0, 0 };
+       static clock_serv_t clock_service;
 
-       if (caa_unlikely(clock_gettime(CLOCK_MONOTONIC, &ts)))
+       if (caa_unlikely(!clock_service)) {
+               if (host_get_clock_service(mach_host_self(),
+                               SYSTEM_CLOCK, &clock_service))
+                       return -1ULL;
+       }
+       if (caa_unlikely(clock_get_time(clock_service, &ts)))
                return -1ULL;
        return ((uint64_t) ts.tv_sec * 1000000000ULL) + ts.tv_nsec;
 }
 
-#elif defined(__APPLE__)
+#elif defined(CONFIG_RCU_HAVE_CLOCK_GETTIME)
 
-#include <mach/mach.h>
-#include <mach/clock.h>
-#include <mach/mach_time.h>
 #include <time.h>
 #include <stdint.h>
 
@@ -181,15 +187,9 @@ typedef uint64_t caa_cycles_t;
 
 static inline caa_cycles_t caa_get_cycles (void)
 {
-       mach_timespec_t ts = { 0, 0 };
-       static clock_serv_t clock_service;
+       struct timespec ts;
 
-       if (caa_unlikely(!clock_service)) {
-               if (host_get_clock_service(mach_host_self(),
-                               SYSTEM_CLOCK, &clock_service))
-                       return -1ULL;
-       }
-       if (caa_unlikely(clock_get_time(clock_service, &ts)))
+       if (caa_unlikely(clock_gettime(CLOCK_MONOTONIC, &ts)))
                return -1ULL;
        return ((uint64_t) ts.tv_sec * 1000000000ULL) + ts.tv_nsec;
 }