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authorSzabolcs Nagy <nsz@port70.net>2018-04-28 17:25:41 +0000
committerRich Felker <dalias@aerifal.cx>2018-06-20 21:35:45 -0400
commitb64d66d0b04fde0af63c3a292be423736294dca9 (patch)
tree8235178c05ce2e5de96f16c3ad3b14f3d47b1e18 /include/sys/mman.h
parent84b25160e7e15e7531533a9a6b22d5431d1b7629 (diff)
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add mlock2 linux syscall wrapper
mlock2 syscall was added in linux v4.4 and glibc has api for it.
It falls back to mlock in case of flags==0, so that case works
even on older kernels.

MLOCK_ONFAULT is moved under _GNU_SOURCE following glibc.
Diffstat (limited to 'include/sys/mman.h')
-rw-r--r--include/sys/mman.h11
1 files changed, 8 insertions, 3 deletions
diff --git a/include/sys/mman.h b/include/sys/mman.h
index 19dd844e..80e1da75 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -94,6 +94,13 @@ extern "C" {
 #define MADV_SOFT_OFFLINE 101
 #endif
 
+#ifdef _GNU_SOURCE
+#define MREMAP_MAYMOVE 1
+#define MREMAP_FIXED 2
+
+#define MLOCK_ONFAULT 0x01
+#endif
+
 #include <bits/mman.h>
 
 void *mmap (void *, size_t, int, int, int, off_t);
@@ -110,14 +117,12 @@ int mlockall (int);
 int munlockall (void);
 
 #ifdef _GNU_SOURCE
-#define MREMAP_MAYMOVE 1
-#define MREMAP_FIXED 2
 void *mremap (void *, size_t, size_t, int, ...);
 int remap_file_pages (void *, size_t, int, size_t, int);
+int mlock2 (const void *, size_t, unsigned);
 #endif
 
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define MLOCK_ONFAULT   0x01
 int madvise (void *, size_t, int);
 int mincore (void *, size_t, unsigned char *);
 #endif