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// -*- C++ -*-
#include "ace/OS_NS_unistd.h"
#include "ace/OS_NS_sys_mman.h"
#include "ace/OS_NS_sys_stat.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
ACE_INLINE ACE_HANDLE
ACE_Mem_Map::handle () const
{
ACE_TRACE ("ACE_Mem_Map::handle");
return this->handle_;
}
// Return the name of file that is mapped (if any).
ACE_INLINE const ACE_TCHAR *
ACE_Mem_Map::filename () const
{
return this->filename_;
}
ACE_INLINE int
ACE_Mem_Map::map (ACE_HANDLE handle,
size_t length,
int prot,
int share,
void *addr,
ACE_OFF_T offset,
LPSECURITY_ATTRIBUTES sa)
{
ACE_TRACE ("ACE_Mem_Map::map");
return this->map_it (handle, length, prot, share, addr, offset, sa);
}
// Remap the file associated with <this->handle_>.
ACE_INLINE int
ACE_Mem_Map::map (size_t length,
int prot,
int share,
void *addr,
ACE_OFF_T offset,
LPSECURITY_ATTRIBUTES sa)
{
ACE_TRACE ("ACE_Mem_Map::map");
// If we're already mapped at a particular location then try to
// remap the file using the same base address.
if (addr == 0 && this->base_addr_ != 0 && this->base_addr_ != MAP_FAILED)
{
share |= MAP_FIXED;
addr = this->base_addr_;
}
return this->map_it (this->handle (), length, prot,
share, addr, offset, sa);
}
// This operator passes back the starting address of the mapped file.
ACE_INLINE int
ACE_Mem_Map::operator () (void *&addr)
{
ACE_TRACE ("ACE_Mem_Map::operator");
if (this->base_addr_ == MAP_FAILED)
return -1;
else
{
addr = this->base_addr_;
return 0;
}
}
// Return the base address.
ACE_INLINE void *
ACE_Mem_Map::addr () const
{
ACE_TRACE ("ACE_Mem_Map::addr");
return this->base_addr_;
}
// This function returns the number of bytes currently mapped in the
// file.
ACE_INLINE size_t
ACE_Mem_Map::size () const
{
ACE_TRACE ("ACE_Mem_Map::size");
return this->length_;
}
ACE_INLINE int
ACE_Mem_Map::close_filemapping_handle (void)
{
int result = 0;
if (this->file_mapping_ != this->handle_
&& this->file_mapping_ != ACE_INVALID_HANDLE)
{
result = ACE_OS::close (this->file_mapping_);
this->file_mapping_ = ACE_INVALID_HANDLE;
}
return result;
}
// Unmap the region starting at <this->base_addr_>.
ACE_INLINE int
ACE_Mem_Map::unmap (ssize_t len)
{
ACE_TRACE ("ACE_Mem_Map::unmap");
this->close_filemapping_handle ();
if (this->base_addr_ != MAP_FAILED)
{
int const result = ACE_OS::munmap (this->base_addr_,
len < 0 ? this->length_ : (size_t)len);
this->base_addr_ = MAP_FAILED;
return result;
}
else
return 0;
}
// Unmap the region starting at <addr_>.
ACE_INLINE int
ACE_Mem_Map::unmap (void *addr, ssize_t len)
{
ACE_TRACE ("ACE_Mem_Map::unmap");
this->close_filemapping_handle ();
return ACE_OS::munmap (addr,
len < 0 ? this->length_ : (size_t)len);
}
// Sync <len> bytes of the memory region to the backing store starting
// at <this->base_addr_>.
ACE_INLINE int
ACE_Mem_Map::sync (size_t len, int flags)
{
ACE_TRACE ("ACE_Mem_Map::sync");
return ACE_OS::msync (this->base_addr_,
len,
flags);
}
// Sync the whole mapped region.
ACE_INLINE int
ACE_Mem_Map::sync (int flags)
{
ACE_TRACE ("ACE_Mem_Map::sync");
return ACE_OS::msync (this->base_addr_,
this->length_,
flags);
}
// Sync <len> bytes of the memory region to the backing store starting
// at <addr_>.
ACE_INLINE int
ACE_Mem_Map::sync (void *addr, size_t len, int flags)
{
ACE_TRACE ("ACE_Mem_Map::sync");
return ACE_OS::msync (addr, len, flags);
}
// Change the protection of the pages of the mapped region to <prot>
// starting at <this->base_addr_> up to <len> bytes.
ACE_INLINE int
ACE_Mem_Map::protect (size_t len, int prot)
{
ACE_TRACE ("ACE_Mem_Map::protect");
return ACE_OS::mprotect (this->base_addr_, len, prot);
}
// Change the protection of all the pages of the mapped region to <prot>
// starting at <this->base_addr_>.
ACE_INLINE int
ACE_Mem_Map::protect (int prot)
{
ACE_TRACE ("ACE_Mem_Map::protect");
return ACE_OS::mprotect (this->base_addr_, this->length_, prot);
}
// Change the protection of the pages of the mapped region to <prot>
// starting at <addr> up to <len> bytes.
ACE_INLINE int
ACE_Mem_Map::protect (void *addr, size_t len, int prot)
{
ACE_TRACE ("ACE_Mem_Map::protect");
return ACE_OS::mprotect (addr, len, prot);
}
// Hook into the underlying VM system.
ACE_INLINE int
ACE_Mem_Map::advise (int behavior, int len)
{
ACE_TRACE ("ACE_Mem_Map::advise");
const size_t advise_len =
len < 0 ? this->length_ : static_cast<size_t> (len);
return ACE_OS::madvise ((caddr_t) this->base_addr_,
advise_len,
behavior);
}
ACE_INLINE int
ACE_Mem_Map::close_handle (void)
{
int result = 0;
if (this->close_handle_)
{
this->close_handle_ = false;
result = ACE_OS::close (this->handle_);
this->handle_ = ACE_INVALID_HANDLE;
}
return result;
}
ACE_END_VERSIONED_NAMESPACE_DECL
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