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it turns out you don't need -1/EGAIN to know edge triggering told you

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there is no more data, it's enough to read/write less than you asked for
This commit is contained in:
leitner 2014-06-05 19:17:24 +00:00
parent f3c0e69988
commit d9cbb3940c
6 changed files with 61 additions and 15 deletions
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15
io/io_mmapwritefile.c
View File

@ -20,7 +20,7 @@ int64 io_mmapwritefile(int64 out,int64 in,uint64 off,uint64 bytes,io_write_callb
const char* c;
unsigned long left;
#ifdef __MINGW32__
if (!e->mh) e->mh=CreateFileMapping(out,0,PAGE_READONLY,0,0,NULL);
if (!e->mh) e->mh=CreateFileMapping(in,0,PAGE_READONLY,0,0,NULL);
if (!e->mh) goto readwrite;
#endif
do {
@ -56,8 +56,7 @@ int64 io_mmapwritefile(int64 out,int64 in,uint64 off,uint64 bytes,io_write_callb
while (left>0) {
m=writecb(out,c,left);
if (m<0) {
e->canwrite=0;
e->next_write=-1;
io_eagain(out);
if (errno!=EAGAIN) {
#ifdef __MINGW32__
UnmapViewOfFile(e->mmapped);
@ -75,6 +74,11 @@ int64 io_mmapwritefile(int64 out,int64 in,uint64 off,uint64 bytes,io_write_callb
bytes-=m;
off+=m;
c+=m;
if (e && left>0) {
e->canwrite=0;
e->next_write=-1;
return sent;
}
}
} while (bytes);
if (e->mmapped) {
@ -109,6 +113,11 @@ readwrite:
n-=m;
bytes-=m;
tmp+=m;
if (e && m!=n) {
e->canwrite=0;
e->next_write=-1;
goto abort;
}
}
}
abort:

39
io/io_sendfile.c
View File

@ -14,8 +14,14 @@
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)
if (r==-1) {
io_entry* e=iarray_get(&io_fds,s);
if (e) {
e->canwrite=0;
e->next_write=-1;
}
return (errno==EAGAIN?(sbytes?sbytes:-1):-3);
}
return n;
}
@ -31,6 +37,13 @@ int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
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;
if (r!=bytes) {
io_entry* e=iarray_get(&io_fds,s);
if (e) {
e->canwrite=0;
e->next_write=-1;
}
}
return r;
}
@ -45,6 +58,13 @@ 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;
if (r!=bytes) {
io_entry* e=iarray_get(&io_fds,s);
if (e) {
e->canwrite=0;
e->next_write=-1;
}
}
return r;
}
@ -65,9 +85,16 @@ int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
p.file_bytes=bytes;
p.trailer_data=0;
p.trailer_length=0;
if (send_file(&destfd,&p,0)>=0)
if (send_file(&destfd,&p,0)>=0) {
if (p.bytes_sent != bytes) {
io_entry* e=iarray_get(&io_fds,s);
if (e) {
e->canwrite=0;
e->next_write=-1;
}
}
return p.bytes_sent;
if (errno==EAGAIN)
} if (errno==EAGAIN)
return -1;
else
return -3;
@ -99,15 +126,17 @@ int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
n-=todo;
if (n==0) return done;
continue;
} else if (i==-1) {
} else {
if (e) {
e->canwrite=0;
e->next_write=-1;
}
if (i==-1)
return (errno==EAGAIN?-1:-3);
} else
else
return done+i;
}
}
return 0;
}
#endif

4
io/io_tryread.c
View File

@ -86,7 +86,7 @@ int64 io_tryread(int64 d,char* buf,int64 len) {
if (!e) { errno=EBADF; return -3; }
if (!e->nonblock) {
p.fd=d;
if (p.fd != d) { errno=EBADF; return -3; } /* catch overflow */
if (p.fd!=d) { errno=EBADF; return -3; } /* catch integer truncation */
p.events=POLLIN;
switch (poll(&p,1,0)) {
case -1: return -3;
@ -110,7 +110,7 @@ int64 io_tryread(int64 d,char* buf,int64 len) {
if (errno!=EAGAIN)
r=-3;
}
if (r==-1 || r==0) {
if (r!=len) {
e->canread=0;
#if defined(HAVE_SIGIO) || defined(HAVE_EPOLL)
if (d==alt_firstread) {

2
io/io_trywrite.c
View File

@ -104,7 +104,7 @@ int64 io_trywrite(int64 d,const char* buf,int64 len) {
if (errno!=EAGAIN)
r=-3;
}
if (r==-1 || r==0) {
if (r!=len) {
e->canwrite=0;
#if defined(HAVE_SIGIO) || defined(HAVE_EPOLL)
if (d==alt_firstwrite) {

11
io/io_waituntil2.c
View File

@ -125,8 +125,15 @@ int64 io_waituntil2(int64 milliseconds) {
int n;
struct epoll_event y[100];
io_entry* e;
if (alt_firstread>=0 && (e=iarray_get(&io_fds,alt_firstread)) && e->canread) return 1;
if (alt_firstwrite>=0 && (e=iarray_get(&io_fds,alt_firstwrite)) && e->canwrite) return 1;
if (alt_firstread>=0 && (e=iarray_get(&io_fds,alt_firstread)) && e->canread) {
// write(1,"r",1);
return 1;
}
if (alt_firstwrite>=0 && (e=iarray_get(&io_fds,alt_firstwrite)) && e->canwrite) {
// write(1,"w",1);
return 1;
}
// write(1,".",1);
if ((n=epoll_wait(io_master,y,100,milliseconds))==-1) return -1;
for (i=0; i<n; ++i) {
e=iarray_get(&io_fds,y[i].data.fd);

1
io/iob_send.c
View File

@ -237,6 +237,7 @@ eagain:
goto abort;
}
}
io_eagain(s);
} else break;
}
abort: