Ticket #55337: patch-mbuffer-darwin.diff

mbuffer.c

@@ -192 +192 @@
 #endif
 #endif
 
+/* --------------------------------------------------------------------
+   Misc OSX compilation fixes, injected here (crudely) for convenience.
+   -------------------------------------------------------------------- */
+#ifdef __APPLE__
+#include <mach/clock.h>
+#include <mach/mach.h>
+#include <sys/time.h>
+#include <semaphore.h>
+#include <AvailabilityMacros.h>
+
+/* Only named semaphores work on OSX, so wrap the calls with names
+   Some snippets courtesy of Jorgen Lundman.  */
+
+struct timespec ts;
+
+static inline int mac_sem_init(sem_t *sem, int pshared, int value)
+{
+    char *fname = strdup("/tmp/.mbuffer.XXXXXX");
+    mktemp(fname);
+    *sem = sem_open(fname, O_CREAT, 0600, value);
+    unlink(fname);
+    free(fname);
+    return 0;
+}
+
+static inline int mac_sem_destroy(sem_t *sem)
+{
+    sem_close(sem);
+    return 0;
+}
+
+static inline int mac_sem_wait(sem_t *sem)
+{
+    return sem_wait(*sem);
+}
+
+static inline int mac_sem_post(sem_t *sem)
+{
+    return sem_post(*sem);
+}
+
+static inline int mac_sem_getvalue(sem_t *sem, int *value)
+{
+    *value = 0;
+    return 0;
+}
+
+
+/* If the version of OSX is <= 10.11, then we need to implement
+ * our own Linux clock_gettime()
+ */
+
+#ifndef MAC_OS_X_VERSION_10_12
+#define MAC_OS_X_VERSION_10_12 101200
+#endif
+
+#define __APPLE_HAVE_CLOCK_GETTIME defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_12
+
+#if !(__APPLE_HAVE_CLOCK_GETTIME)
+#warning "Injecting clock_gettime for OSX < 10.12"
+static inline int clock_gettime(unsigned long int id, struct timespec *ts)
+{
+    clock_serv_t cclock;
+    mach_timespec_t mts;
+    host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+    clock_get_time(cclock, &mts);
+    mach_port_deallocate(mach_task_self(), cclock);
+    ts->tv_sec = mts.tv_sec;
+    ts->tv_nsec = mts.tv_nsec;
+    return 0;
+}
+
+typedef unsigned long clockid_t;
+#define CLOCK_REALTIME 0
+
+#endif /* __APPLE_HAVE_CLOCK_GETTIME */
+
+/* And now wrap the function calls to our inlined replacements: */
+#define sem_init mac_sem_init
+#define sem_destroy mac_sem_destroy
+#define sem_wait mac_sem_wait
+#define sem_post mac_sem_post
+#define sem_getvalue mac_sem_getvalue
+
+#endif /* __APPLE__ */
+
+
+
+
 static sem_t Dev2Buf, Buf2Dev;
 static pthread_cond_t
         PercLow = PTHREAD_COND_INITIALIZER,     /* low watermark */