Marginally more robust glibc version test for sync_file_range detection.

[redis.git] / src / config.h

diff --git a/src/config.h b/src/config.h
index 136fd40c4c8eda0f89e975814de4127652c48ae8..5e6d2807271cd04266522fcfd8f0f665b61670f2 100644 (file)
--- a/src/config.h
+++ b/src/config.h
@@ -38,6 +38,13 @@
 #define HAVE_KQUEUE 1
 #endif
 
+#ifdef __sun
+#include <sys/feature_tests.h>
+#ifdef _DTRACE_VERSION
+#define HAVE_EVPORT 1
+#endif
+#endif
+
 /* Define aof_fsync to fdatasync() in Linux and fsync() for all the rest */
 #ifdef __linux__
 #define aof_fsync fdatasync
@@ -45,6 +52,28 @@
 #define aof_fsync fsync
 #endif
 
+/* Define rdb_fsync_range to sync_file_range() on Linux, otherwise we use
+ * the plain fsync() call. */
+#ifdef __linux__
+#include <linux/version.h>
+#include <features.h>
+#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
+#if (LINUX_VERSION_CODE >= 0x020611 && __GLIBC_PREREQ(2, 6))
+#define HAVE_SYNC_FILE_RANGE 1
+#endif
+#else
+#if (LINUX_VERSION_CODE >= 0x020611)
+#define HAVE_SYNC_FILE_RANGE 1
+#endif
+#endif
+#endif
+
+#ifdef HAVE_SYNC_FILE_RANGE
+#define rdb_fsync_range(fd,off,size) sync_file_range(fd,off,size,SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE)
+#else
+#define rdb_fsync_range(fd,off,size) fsync(fd)
+#endif
+
 /* Byte ordering detection */
 #include <sys/types.h> /* This will likely define BYTE_ORDER */