libreplace: add fdatasync() if not available

[ira/wip.git] / lib / replace / replace.h

diff --git a/lib/replace/replace.h b/lib/replace/replace.h
index fe1f732acb275434ffdbab15ae48d768ecda15f5..a4ef231385ef73cfd53b9f49198d609c98a91352 100644 (file)
--- a/lib/replace/replace.h
+++ b/lib/replace/replace.h
@@ -140,6 +140,12 @@ char *rep_strdup(const char *s);
 void *rep_memmove(void *dest,const void *src,int size);
 #endif
 
+#ifndef HAVE_MEMMEM
+#define memmem rep_memmem
+void *rep_memmem(const void *haystack, size_t haystacklen,
+                const void *needle, size_t needlelen);
+#endif
+
 #ifndef HAVE_MKTIME
 #define mktime rep_mktime
 /* prototype is in "system/time.h" */
@@ -258,6 +264,10 @@ char *rep_realpath(const char *path, char *resolved_path);
 int rep_lchown(const char *fname,uid_t uid,gid_t gid);
 #endif
 
+#ifdef HAVE_UNIX_H
+#include <unix.h>
+#endif
+
 #ifndef HAVE_SETLINEBUF
 #define setlinebuf rep_setlinebuf
 void rep_setlinebuf(FILE *);
@@ -700,4 +710,27 @@ char *ufc_crypt(const char *key, const char *salt);
 #endif
 #endif
 
+/* these macros gain us a few percent of speed on gcc */
+#if (__GNUC__ >= 3)
+/* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
+   as its first argument */
+#ifndef likely
+#define likely(x)   __builtin_expect(!!(x), 1)
+#endif
+#ifndef unlikely
+#define unlikely(x) __builtin_expect(!!(x), 0)
+#endif
+#else
+#ifndef likely
+#define likely(x) (x)
+#endif
+#ifndef unlikely
+#define unlikely(x) (x)
+#endif
+#endif
+
+#ifndef HAVE_FDATASYNC
+#define fdatasync(fd) fsync(fd)
+#endif
+
 #endif /* _LIBREPLACE_REPLACE_H */