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// -*- C++ -*-
//
// $Id$
#include "ace/OS_NS_fcntl.h"
#include "ace/OS_NS_unistd.h"
#include "ace/OS_NS_stdio.h"
#include "ace/OS_NS_macros.h"
#include "ace/OS_NS_errno.h"
#if defined (__Lynx__)
# include "ace/OS_NS_sys_stat.h"
#endif /* __Lynx__ */
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
#if defined (ACE_HAS_VOIDPTR_MMAP)
// Needed for some odd OS's (e.g., SGI).
typedef void *ACE_MMAP_TYPE;
#else
typedef char *ACE_MMAP_TYPE;
#endif /* ACE_HAS_VOIDPTR_MMAP */
ACE_INLINE int
ACE_OS::madvise (caddr_t addr, size_t len, int map_advice)
{
ACE_OS_TRACE ("ACE_OS::madvise");
#if !defined (ACE_LACKS_MADVISE)
ACE_OSCALL_RETURN (::madvise (addr, len, map_advice), int, -1);
#else
ACE_UNUSED_ARG (addr);
ACE_UNUSED_ARG (len);
ACE_UNUSED_ARG (map_advice);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_WIN32 */
}
ACE_INLINE void *
ACE_OS::mmap (void *addr,
size_t len,
int prot,
int flags,
ACE_HANDLE file_handle,
off_t off,
ACE_HANDLE *file_mapping,
LPSECURITY_ATTRIBUTES sa,
const ACE_TCHAR *file_mapping_name)
{
ACE_OS_TRACE ("ACE_OS::mmap");
#if !defined (ACE_WIN32) || defined (ACE_HAS_PHARLAP)
ACE_UNUSED_ARG (file_mapping_name);
#endif /* !defined (ACE_WIN32) || defined (ACE_HAS_PHARLAP) */
#if defined (ACE_WIN32) && !defined (ACE_HAS_PHARLAP)
# if defined(ACE_HAS_WINCE)
ACE_UNUSED_ARG (addr);
if (ACE_BIT_ENABLED (flags, MAP_FIXED)) // not supported
{
errno = EINVAL;
return MAP_FAILED;
}
# else
if (!ACE_BIT_ENABLED (flags, MAP_FIXED))
addr = 0;
else if (addr == 0) // can not map to address 0
{
errno = EINVAL;
return MAP_FAILED;
}
# endif
int nt_flags = 0;
ACE_HANDLE local_handle = ACE_INVALID_HANDLE;
// Ensure that file_mapping is non-zero.
if (file_mapping == 0)
file_mapping = &local_handle;
if (ACE_BIT_ENABLED (flags, MAP_PRIVATE))
{
# if !defined(ACE_HAS_WINCE)
prot = PAGE_WRITECOPY;
# endif // ACE_HAS_WINCE
nt_flags = FILE_MAP_COPY;
}
else if (ACE_BIT_ENABLED (flags, MAP_SHARED))
{
if (ACE_BIT_ENABLED (prot, PAGE_READONLY))
nt_flags = FILE_MAP_READ;
if (ACE_BIT_ENABLED (prot, PAGE_READWRITE))
nt_flags = FILE_MAP_WRITE;
}
// Only create a new handle if we didn't have a valid one passed in.
if (*file_mapping == ACE_INVALID_HANDLE)
{
# if !defined(ACE_HAS_WINCE) && (!defined (ACE_HAS_WINNT4) || (ACE_HAS_WINNT4 == 0))
int try_create = 1;
if ((file_mapping_name != 0) && (*file_mapping_name != 0))
{
// On Win9x, we first try to OpenFileMapping to
// file_mapping_name. Only if there is no mapping object
// with that name, and the desired name is valid, do we try
// CreateFileMapping.
*file_mapping = ACE_TEXT_OpenFileMapping (nt_flags,
0,
file_mapping_name);
if (*file_mapping != 0
|| (::GetLastError () == ERROR_INVALID_NAME
&& ::GetLastError () == ERROR_FILE_NOT_FOUND))
try_create = 0;
}
if (try_create)
# endif /* !ACE_HAS_WINCE && (ACE_HAS_WINNT4 || ACE_HAS_WINNT4 == 0) */
{
SECURITY_ATTRIBUTES sa_buffer;
SECURITY_DESCRIPTOR sd_buffer;
const LPSECURITY_ATTRIBUTES attr =
ACE_OS::default_win32_security_attributes_r (sa,
&sa_buffer,
&sd_buffer);
*file_mapping = ACE_TEXT_CreateFileMapping (file_handle,
attr,
prot,
0,
0,
file_mapping_name);
}
}
if (*file_mapping == 0)
ACE_FAIL_RETURN (MAP_FAILED);
# if defined (ACE_OS_EXTRA_MMAP_FLAGS)
nt_flags |= ACE_OS_EXTRA_MMAP_FLAGS;
# endif /* ACE_OS_EXTRA_MMAP_FLAGS */
# if !defined (ACE_HAS_WINCE)
void *addr_mapping = ::MapViewOfFileEx (*file_mapping,
nt_flags,
0,
off,
len,
addr);
# else
void *addr_mapping = ::MapViewOfFile (*file_mapping,
nt_flags,
0,
off,
len);
# endif /* ! ACE_HAS_WINCE */
// Only close this down if we used the temporary.
if (file_mapping == &local_handle)
::CloseHandle (*file_mapping);
if (addr_mapping == 0)
ACE_FAIL_RETURN (MAP_FAILED);
else
return addr_mapping;
#elif defined (ACE_HAS_LYNXOS_BROKEN_MMAP)
// The LynxOS mmap doesn't allow operations on plain
// file descriptors. So, create a shm object and use that.
ACE_UNUSED_ARG (sa);
char name [128];
sprintf (name, "%d", file_handle);
// Assumes that this was called by ACE_Mem_Map, so &file_mapping !=
// 0. Otherwise, we don't support the incomplete LynxOS mmap
// implementation. We do support it by creating a hidden shared
// memory object, and using that for the mapping.
int shm_handle;
if (! file_mapping)
file_mapping = &shm_handle;
if ((*file_mapping = ::shm_open (name,
O_RDWR | O_CREAT | O_TRUNC,
ACE_DEFAULT_FILE_PERMS)) == -1)
return MAP_FAILED;
else
{
// The size of the shared memory object must be explicitly set on LynxOS.
const off_t filesize = ACE_OS::filesize (file_handle);
if (::ftruncate (*file_mapping, filesize) == -1)
return MAP_FAILED;
else
{
# if defined (ACE_OS_EXTRA_MMAP_FLAGS)
flags |= ACE_OS_EXTRA_MMAP_FLAGS;
# endif /* ACE_OS_EXTRA_MMAP_FLAGS */
char *map = (char *) ::mmap ((ACE_MMAP_TYPE) addr,
len,
prot,
flags,
*file_mapping,
off);
if (map == MAP_FAILED)
return MAP_FAILED;
else
// Finally, copy the file contents to the shared memory object.
return ::read (file_handle, map, (int) filesize) == filesize
? map
: MAP_FAILED;
}
}
#elif !defined (ACE_LACKS_MMAP)
ACE_UNUSED_ARG (sa);
# if defined (ACE_OS_EXTRA_MMAP_FLAGS)
flags |= ACE_OS_EXTRA_MMAP_FLAGS;
# endif /* ACE_OS_EXTRA_MMAP_FLAGS */
ACE_UNUSED_ARG (file_mapping);
# if defined (ACE_OPENVMS)
::fsync(file_handle);
# endif
ACE_OSCALL_RETURN ((void *) ::mmap ((ACE_MMAP_TYPE) addr,
len,
prot,
flags,
file_handle,
off),
void *, MAP_FAILED);
#else
ACE_UNUSED_ARG (addr);
ACE_UNUSED_ARG (len);
ACE_UNUSED_ARG (prot);
ACE_UNUSED_ARG (flags);
ACE_UNUSED_ARG (file_handle);
ACE_UNUSED_ARG (off);
ACE_UNUSED_ARG (file_mapping);
ACE_UNUSED_ARG (sa);
ACE_NOTSUP_RETURN (MAP_FAILED);
#endif /* ACE_WIN32 && !ACE_HAS_PHARLAP */
}
// Implements simple read/write control for pages. Affects a page if
// part of the page is referenced. Currently PROT_READ, PROT_WRITE,
// and PROT_RDWR has been mapped in OS.h. This needn't have anything
// to do with a mmap region.
ACE_INLINE int
ACE_OS::mprotect (void *addr, size_t len, int prot)
{
ACE_OS_TRACE ("ACE_OS::mprotect");
#if defined (ACE_WIN32) && !defined (ACE_HAS_PHARLAP)
DWORD dummy; // Sigh!
return ::VirtualProtect(addr, len, prot, &dummy) ? 0 : -1;
#elif !defined (ACE_LACKS_MPROTECT)
ACE_OSCALL_RETURN (::mprotect ((ACE_MMAP_TYPE) addr, len, prot), int, -1);
#else
ACE_UNUSED_ARG (addr);
ACE_UNUSED_ARG (len);
ACE_UNUSED_ARG (prot);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_WIN32 && !ACE_HAS_PHARLAP */
}
ACE_INLINE int
ACE_OS::msync (void *addr, size_t len, int sync)
{
ACE_OS_TRACE ("ACE_OS::msync");
#if defined (ACE_WIN32) && !defined (ACE_HAS_PHARLAP)
ACE_UNUSED_ARG (sync);
ACE_WIN32CALL_RETURN (ACE_ADAPT_RETVAL (::FlushViewOfFile (addr, len), ace_result_), int, -1);
#elif !defined (ACE_LACKS_MSYNC)
# if !defined (ACE_HAS_BROKEN_NETBSD_MSYNC)
ACE_OSCALL_RETURN (::msync ((ACE_MMAP_TYPE) addr, len, sync), int, -1);
# else
ACE_OSCALL_RETURN (::msync ((ACE_MMAP_TYPE) addr, len), int, -1);
ACE_UNUSED_ARG (sync);
# endif /* ACE_HAS_BROKEN_NETBSD_MSYNC */
#else
ACE_UNUSED_ARG (addr);
ACE_UNUSED_ARG (len);
ACE_UNUSED_ARG (sync);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_WIN32 && !ACE_HAS_PHARLAP */
}
ACE_INLINE int
ACE_OS::munmap (void *addr, size_t len)
{
ACE_OS_TRACE ("ACE_OS::munmap");
#if defined (ACE_WIN32)
ACE_UNUSED_ARG (len);
ACE_WIN32CALL_RETURN (ACE_ADAPT_RETVAL (::UnmapViewOfFile (addr), ace_result_), int, -1);
#elif !defined (ACE_LACKS_MMAP)
ACE_OSCALL_RETURN (::munmap ((ACE_MMAP_TYPE) addr, len), int, -1);
#else
ACE_UNUSED_ARG (addr);
ACE_UNUSED_ARG (len);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_WIN32 */
}
ACE_INLINE ACE_HANDLE
ACE_OS::shm_open (const ACE_TCHAR *filename,
int mode,
int perms,
LPSECURITY_ATTRIBUTES sa)
{
ACE_OS_TRACE ("ACE_OS::shm_open");
# if defined (ACE_HAS_SHM_OPEN)
ACE_UNUSED_ARG (sa);
ACE_OSCALL_RETURN (::shm_open (ACE_TEXT_ALWAYS_CHAR(filename), mode, perms), ACE_HANDLE, ACE_INVALID_HANDLE);
# elif defined (ACE_OPENVMS)
ACE_OSCALL_RETURN (::open (filename, mode, perms, ACE_TEXT("shr=get,put,upd")), ACE_HANDLE, ACE_INVALID_HANDLE);
# else /* ! ACE_HAS_SHM_OPEN */
// Just use ::open.
return ACE_OS::open (filename, mode, perms, sa);
# endif /* ACE_HAS_SHM_OPEN */
}
ACE_INLINE int
ACE_OS::shm_unlink (const ACE_TCHAR *path)
{
ACE_OS_TRACE ("ACE_OS::shm_unlink");
# if defined (ACE_HAS_SHM_OPEN)
ACE_OSCALL_RETURN (::shm_unlink (ACE_TEXT_ALWAYS_CHAR(path)), int, -1);
# else /* ! ACE_HAS_SHM_OPEN */
// Just use ::unlink.
return ACE_OS::unlink (path);
# endif /* ACE_HAS_SHM_OPEN */
}
ACE_END_VERSIONED_NAMESPACE_DECL
|
