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/* http://delegate.uec.ac.jp:8081/club/mma/~shimiz98/misc/sendfile.html */
#define _FILE_OFFSET_BITS 64
#include "io_internal.h"
#include "havebsdsf.h"
#include "havesendfile.h"
#include <errno.h>
#if defined(HAVE_BSDSENDFILE)
#define SENDFILE 1
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
off_t sbytes;
int r=sendfile(fd,s,off,n,0,&sbytes,0);
if (r==-1)
return (errno==EAGAIN?(sbytes?sbytes:-1):-3);
return n;
}
#elif defined(HAVE_SENDFILE)
#ifdef __hpux__
#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/socket.h>
int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
long long r=sendfile64(out,in,off,bytes,0,0);
if (r==-1 && errno!=EAGAIN) r=-3;
return r;
}
#elif defined (__sun__) && defined(__svr4__)
#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sendfile.h>
int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
off64_t o=off;
long long r=sendfile64(out,in,&o,bytes);
if (r==-1 && errno!=EAGAIN) r=-3;
return r;
}
#elif defined(_AIX)
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <errno.h>
int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
struct sf_parms p;
int destfd=out;
p.header_data=0;
p.header_length=0;
p.file_descriptor=in;
p.file_offset=off;
p.file_bytes=bytes;
p.trailer_data=0;
p.trailer_length=0;
if (send_file(&destfd,&p,0)>=0)
return p.bytes_sent;
if (errno==EAGAIN)
return -1;
else
return -3;
}
#elif defined(__linux__)
#if defined(__GLIBC__)
#include <sys/sendfile.h>
#elif defined(__dietlibc__)
#include <sys/sendfile.h>
#else
#include <linux/unistd.h>
_syscall4(int,sendfile,int,out,int,in,long *,offset,unsigned long,count)
#endif
int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
off_t o=off;
io_entry* e=array_get(&io_fds,sizeof(io_entry),s);
off_t i;
uint64 done=0;
/* What a spectacularly broken design for sendfile64.
* The offset is 64-bit for sendfile64, but the count is not. */
while (n) {
off_t todo=n>0x7fffffff?0x7fffffff:n;
i=sendfile(s,fd,&o,todo);
if (i==todo) {
done+=todo;
n-=todo;
if (n==0) return done;
continue;
} else if (i==-1) {
if (e) {
e->canwrite=0;
e->next_write=-1;
}
return (errno==EAGAIN?-1:-3);
} else
return done+i;
}
return 0;
}
#endif
#elif defined(__MINGW32__)
#include <windows.h>
#include <mswsock.h>
int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
io_entry* e=array_get(&io_fds,sizeof(io_entry),out);
if (!e) { errno=EBADF; return -3; }
if (e->sendfilequeued==1) {
/* we called TransmitFile, and it returned. */
e->sendfilequeued=2;
errno=e->errorcode;
if (e->bytes_written==-1) return -1;
if (e->bytes_written!=bytes) { /* we wrote less than caller wanted to write */
e->sendfilequeued=1; /* so queue next request */
off+=e->bytes_written;
bytes-=e->bytes_written;
e->os.Offset=off;
e->os.OffsetHigh=(off>>32);
TransmitFile(out,(HANDLE)in,bytes>0xffff?0xffff:bytes,0,&e->os,0,TF_USE_KERNEL_APC);
}
return e->bytes_written;
} else {
e->sendfilequeued=1;
e->os.Offset=off;
e->os.OffsetHigh=(off>>32);
/* we always write at most 64k, so timeout handling is possible */
if (!TransmitFile(out,(HANDLE)in,bytes>0xffff?0xffff:bytes,0,&e->os,0,TF_USE_KERNEL_APC))
return -3;
}
}
#else
#include <iob.h>
#include <unistd.h>
static int64 writecb(int64 s,const void* buf,uint64 n) {
return write(s,buf,n);
}
int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
return io_mmapwritefile(out,in,off,bytes,writecb);
}
#endif