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Implement try_mmap_fixed for Darwin.

This commit is contained in:
Wolfgang Thaller 2005-06-20 11:43:47 +00:00 committed by Alexandre Julliard
parent 84c8bf5340
commit 4c5f9c091b
1 changed files with 23 additions and 1 deletions
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24
libs/wine/mmap.c
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@ -137,6 +137,28 @@ static int try_mmap_fixed (void *addr, size_t len, int prot, int flags,
return result == addr; return result == addr;
} }
#elif defined(__APPLE__)
/*
* On Darwin, we can use the Mach call vm_allocate to allocate
* anonymous memory at the specified address, and then use mmap with
* MAP_FIXED to replace the mapping.
*/
static int try_mmap_fixed (void *addr, size_t len, int prot, int flags,
int fildes, off_t off)
{
void *result;
result = addr;
if(vm_allocate(mach_task_self(),&result,len,0))
return 0;
else
{
result = mmap( addr, len, prot, flags | MAP_FIXED, fildes, off );
return result == addr;
}
}
#endif /* (__svr4__ || __NetBSD__) && !MAP_TRYFIXED */ #endif /* (__svr4__ || __NetBSD__) && !MAP_TRYFIXED */
@ -182,7 +204,7 @@ void *wine_anon_mmap( void *start, size_t size, int prot, int flags )
#ifdef MAP_TRYFIXED #ifdef MAP_TRYFIXED
/* If available, this will attempt a fixed mapping in-kernel */ /* If available, this will attempt a fixed mapping in-kernel */
flags |= MAP_TRYFIXED; flags |= MAP_TRYFIXED;
#elif defined(__svr4__) || defined(__NetBSD__) #elif defined(__svr4__) || defined(__NetBSD__) || defined(__APPLE__)
if ( try_mmap_fixed( start, size, prot, flags, fdzero, 0 ) ) if ( try_mmap_fixed( start, size, prot, flags, fdzero, 0 ) )
return start; return start;
#endif #endif