00001
00002
00003 #include "ace/OS_NS_sys_sendfile.h"
00004 #include "ace/OS_NS_sys_mman.h"
00005
00006 #if defined (ACE_WIN32) || defined (HPUX)
00007 # include "ace/OS_NS_sys_socket.h"
00008 #else
00009 # include "ace/OS_NS_unistd.h"
00010 #endif
00011
00012 #ifndef ACE_HAS_INLINED_OSCALLS
00013 # include "ace/OS_NS_sys_sendfile.inl"
00014 #endif
00015
00016 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
00017
00018 #ifndef ACE_HAS_SENDFILE
00019 ssize_t
00020 ACE_OS::sendfile_emulation (ACE_HANDLE out_fd,
00021 ACE_HANDLE in_fd,
00022 off_t * offset,
00023 size_t count)
00024 {
00025
00026
00027
00028
00029
00030
00031 void * const buf =
00032 ACE_OS::mmap (0, count, PROT_READ, MAP_SHARED, in_fd, *offset);
00033
00034 if (buf == MAP_FAILED)
00035 return -1;
00036
00037 #if defined (ACE_WIN32) || defined (HPUX)
00038 ssize_t const r =
00039 ACE_OS::send (out_fd, static_cast<const char *> (buf), count);
00040 #else
00041 ssize_t const r = ACE_OS::write (out_fd, buf, count);
00042 #endif
00043
00044 (void) ACE_OS::munmap (buf, count);
00045
00046 if (r > 0)
00047 *offset += static_cast<off_t> (r);
00048
00049 return r;
00050 }
00051 #endif
00052
00053 ACE_END_VERSIONED_NAMESPACE_DECL