diff options
Diffstat (limited to 'include/sys')
| -rw-r--r-- | include/sys/mman.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/sys/mman.h b/include/sys/mman.h index aeeea7d0e..10f4afe24 100644 --- a/include/sys/mman.h +++ b/include/sys/mman.h @@ -100,6 +100,7 @@ extern int posix_madvise (void *__addr, size_t __len, int __advice) __THROW; #endif #ifdef __ARCH_USE_MMU__ + /* Guarantee all whole pages mapped by the range [ADDR,ADDR+LEN) to be memory resident. */ extern int mlock (__const void *__addr, size_t __len) __THROW; @@ -115,6 +116,17 @@ extern int mlockall (int __flags) __THROW; /* All currently mapped pages of the process' address space become unlocked. */ extern int munlockall (void) __THROW; + +#else + +/* On no-mmu systems, memory cannot be swapped out, so + * these functions will always succeed. + */ +static inline int mlock (__const void *__addr, size_t __len) { return 0; } +static inline int munlock (__const void *__addr, size_t __len) { return 0; } +static inline int mlockall (int __flags) { return 0; } +static inline int munlockall (void) { return 0; } + #endif #ifdef __USE_MISC |