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authorschmidt <douglascraigschmidt@users.noreply.github.com>1997-11-16 19:30:26 +0000
committerschmidt <douglascraigschmidt@users.noreply.github.com>1997-11-16 19:30:26 +0000
commit4a74ec8da792a561dfd894c6b31939f0b36d39ba (patch)
tree1ada32d58db0e5d98fab488845a165594cd207f1 /ace/IOStream.cpp
parentef737e28d32c34f3aae6161b3a1297a9836bc3fa (diff)
downloadATCD-4a74ec8da792a561dfd894c6b31939f0b36d39ba.tar.gz
*** empty log message ***
Diffstat (limited to 'ace/IOStream.cpp')
-rw-r--r--ace/IOStream.cpp219
1 files changed, 113 insertions, 106 deletions
diff --git a/ace/IOStream.cpp b/ace/IOStream.cpp
index 91f2b69e127..1c5bdd76577 100644
--- a/ace/IOStream.cpp
+++ b/ace/IOStream.cpp
@@ -110,13 +110,17 @@ ACE_Streambuf::underflow (void)
// If input mode is not set, any attempt to read from the stream is
// a failure.
- if (! (mode_ & ios::in))
+ if (ACE_BIT_DISABLED (mode_, ios::in))
return EOF;
// If base () is empty then this is the first time any get/put
// operation has been attempted on the stream.
+#if defined (ACE_HAS_STANDARD_CPP_LIBRARY)
+ if (!eback ())
+#else /* ACE_HAS_STANDARD_CPP_LIBRARY */
if (!this->base ())
+#endif /* ACE_HAS_STANDARD_CPP_LIBRARY */
{
// Set base () to use our private read buffer. The arguments are:
// beginning of the buffer (base ())
@@ -125,7 +129,7 @@ ACE_Streambuf::underflow (void)
//
// We have to say "no" to the third parameter because we want to
// explicitly handle deletion of the TWO buffers at destruction.
- //
+
setb (this->eback_saved_,
this->eback_saved_ + streambuf_size_, 0);
@@ -153,12 +157,11 @@ ACE_Streambuf::underflow (void)
//
if (this->cur_mode_ == this->put_mode_)
{
- // Dump any pending output to the peer. This is not
- // really necessary because of the dual-buffer arrangement
- // we've set up but intuitively it makes sense to send
- // the pending data before we request data since the peer
- // will probably need what we're sending before it can
- // respond.
+ // Dump any pending output to the peer. This is not really
+ // necessary because of the dual-buffer arrangement we've
+ // set up but intuitively it makes sense to send the pending
+ // data before we request data since the peer will probably
+ // need what we're sending before it can respond.
if (out_waiting () && syncout () == EOF)
return EOF;
@@ -167,16 +170,15 @@ ACE_Streambuf::underflow (void)
this->pbase_saved_ = pbase ();
this->pptr_saved_ = pptr ();
this->epptr_saved_ = epptr ();
- //
+
// Disable put mode as described in the constructor.
- //
setp (0, 0);
- // Like the case where base () is false, we now point base ()
- // to use our private get buffer.
-
+ // Like the case where base () is false, we now point base
+ // () to use our private get buffer.
setb (this->eback_saved_,
- this->eback_saved_ + streambuf_size_, 0);
+ this->eback_saved_ + streambuf_size_,
+ 0);
// And restore the previous state of the get pointers.
@@ -192,10 +194,10 @@ ACE_Streambuf::underflow (void)
// mode before reading everything. In that case, we take this
// opportunity to feed it back to the iostream.
if (in_avail ())
- // Remember that we return an int so that we can give
- // back EOF. The explicit cast prevents us from
- // returning a signed char when we're not returning EOF.
- return (u_char) *gptr ();
+ // Remember that we return an int so that we can give back
+ // EOF. The explicit cast prevents us from returning a signed
+ // char when we're not returning EOF.
+ return (u_char) *gptr ();
}
// We really shouldn't be here unless there is a lack of data in the
@@ -203,7 +205,7 @@ ACE_Streambuf::underflow (void)
int result = fillbuf ();
- // fillbuf will give us EOF if there was an error with the peer. In
+ // Fillbuf will give us EOF if there was an error with the peer. In
// that case, we can do no more input.
if (EOF == result)
@@ -230,8 +232,11 @@ ACE_Streambuf::overflow (int c)
if (! (mode_ & ios::out))
return EOF;
- // First invokation of a get or put function
+#if defined (ACE_HAS_STANDARD_CPP_LIBRARY)
+ if (!eback ())
+#else /* ACE_HAS_STANDARD_CPP_LIBRARY */
if (!base ())
+#endif /* ACE_HAS_STANDARD_CPP_LIBRARY */
{
// Set base () to use put's private buffer.
//
@@ -247,7 +252,7 @@ ACE_Streambuf::overflow (int c)
// Set the mode for optimization.
this->cur_mode_ = this->put_mode_;
}
- else // We're already reading or writting
+ else // We're already reading or writing
{
// If we're coming out of get mode...
if (this->cur_mode_ == this->get_mode_)
@@ -296,9 +301,9 @@ ACE_Streambuf::overflow (int c)
int
ACE_Streambuf::syncin (void)
{
- // As discussed, there really isn't any way to sync input from a socket-like
- // device. We specifially override this base-class function so that it won't
- // do anything evil to us.
+ // As discussed, there really isn't any way to sync input from a
+ // socket-like device. We specifially override this base-class
+ // function so that it won't do anything evil to us.
return 0;
}
@@ -320,18 +325,19 @@ ACE_Streambuf::syncout (void)
int
ACE_Streambuf::sync (void)
{
- // sync () is fairly traditional in that it syncs both input and output.
- // We could have omitted the call to syncin () but someday, we may want it
- // to do something.
+ // sync () is fairly traditional in that it syncs both input and
+ // output. We could have omitted the call to syncin () but someday,
+ // we may want it to do something.
syncin ();
- // Don't bother syncing the output unless there is data to be sent...
+ // Don't bother syncing the output unless there is data to be
+ // sent...
if (out_waiting ())
return syncout ();
-
- return 0;
+ else
+ return 0;
}
// flushbuf
@@ -339,32 +345,31 @@ ACE_Streambuf::sync (void)
int
ACE_Streambuf::flushbuf (void)
{
- // pptr () is one character beyond the last character put
- // into the buffer. pbase () points to the beginning of
- // the put buffer. Unless pptr () is greater than pbase ()
- // there is nothing to be sent to the peer.
- //
+ // pptr () is one character beyond the last character put into the
+ // buffer. pbase () points to the beginning of the put buffer.
+ // Unless pptr () is greater than pbase () there is nothing to be
+ // sent to the peer.
+
if (pptr () <= pbase ())
- return 0;
+ return 0;
// 4/12/97 -- JCEJ
// Kludge!!!
- // If the remote side shuts down the connection, an attempt to
- // send () to the remote will result in the message 'Broken Pipe'
- // I think this is an OS message, I've tracked it down to the
- // ACE_OS::write () function. That's the last one to be called
- // before the message. I can only test this on Linux though, so
- // I don't know how other systems will react.
+ // If the remote side shuts down the connection, an attempt to send
+ // () to the remote will result in the message 'Broken Pipe' I think
+ // this is an OS message, I've tracked it down to the ACE_OS::write
+ // () function. That's the last one to be called before the
+ // message. I can only test this on Linux though, so I don't know
+ // how other systems will react.
//
// To get around this gracefully, I do a PEEK recv () with an
- // immediate (nearly) timeout. recv () is much more graceful
- // on it's failure. If we get -1 from recv () not due to timeout
- // then we know we're SOL.
+ // immediate (nearly) timeout. recv () is much more graceful on
+ // it's failure. If we get -1 from recv () not due to timeout then
+ // we know we're SOL.
//
// Q: Is 'errno' threadsafe? Should the section below be a
// critical section?
//
- //
// char tbuf[1];
// ACE_Time_Value to (0,1);
// if (this->recv (tbuf, 1, MSG_PEEK, &to) == -1)
@@ -376,23 +381,19 @@ ACE_Streambuf::flushbuf (void)
// }
// }
//
- // The correct way to handle this is for the application to
- // trap (and ignore?) SIGPIPE. Thanks to Amos Shapira
- // for reminding me of this.
- //
+ // The correct way to handle this is for the application to trap
+ // (and ignore?) SIGPIPE. Thanks to Amos Shapira for reminding me
+ // of this.
+
+ // Starting at the beginning of the buffer, send as much data as
+ // there is waiting. send guarantees that all of the data will be
+ // sent or an error will be returned.
- // Starting at the beginning of the buffer, send as much
- // data as there is waiting. send guarantees that all
- // of the data will be sent or an error will be returned.
- //
if (this->send (pbase (), pptr () - pbase ()) == -1)
- {
- return EOF;
- }
+ return EOF;
// Now that we've sent everything in the output buffer, we reset the
// buffer pointers to appear empty.
- //
setp (base (), ebuf ());
return 0;
@@ -409,18 +410,19 @@ ACE_Streambuf::get_one_byte (void)
if (this->recv_n (base (), 1, MSG_PEEK, recv_timeout_) != 1)
return EOF;
-
- return 1;
+ else
+ return 1;
}
+// This will be called when the read (get) buffer has been exhausted
+// (ie -- gptr == egptr).
+
int
ACE_Streambuf::fillbuf (void)
- // This will be called when the read (get) buffer has been
- // exhausted (ie -- gptr == egptr)
{
- // Invoke recv_n to get exactly one byte from the remote. This
- // will block until something shows up.
- //
+ // Invoke recv_n to get exactly one byte from the remote. This will
+ // block until something shows up.
+
if (get_one_byte () == EOF)
return EOF;
@@ -440,7 +442,7 @@ ACE_Streambuf::fillbuf (void)
setg (base (), base (), base () + bc);
- // Return the byte-read-count including the one from <get_one_byte>
+ // Return the byte-read-count including the one from <get_one_byte>.
return bc;
}
@@ -457,35 +459,39 @@ ACE_Streambuf::ACE_Streambuf (u_int streambuf_size, int io_mode)
(void)reset_put_buffer ();
}
-u_int ACE_Streambuf::streambuf_size (void)
+u_int
+ACE_Streambuf::streambuf_size (void)
{
return streambuf_size_;
}
-u_int ACE_Streambuf::get_waiting (void)
- // Return the number of bytes not yet gotten.
- // eback + get_waiting = gptr
+// Return the number of bytes not yet gotten. eback + get_waiting =
+// gptr.
+
+u_int
+ACE_Streambuf::get_waiting (void)
{
- return this->gptr_saved_ - this->eback_saved_;
+ return this->gptr_saved_ - this->eback_saved_;
}
-u_int ACE_Streambuf::get_avail (void)
- // Return the number of bytes in the get area (includes some already gotten);
- // eback + get_avail = egptr
+// Return the number of bytes in the get area (includes some already
+// gotten); eback + get_avail = egptr.
+
+u_int
+ACE_Streambuf::get_avail (void)
{
- return this->egptr_saved_ - this->eback_saved_;
+ return this->egptr_saved_ - this->eback_saved_;
}
-u_int ACE_Streambuf::put_avail (void)
- // Return the number of bytes to be 'put' onto the stream media.
- // pbase + put_avail = pptr
+// Return the number of bytes to be 'put' onto the stream media.
+// pbase + put_avail = pptr.
+
+u_int
+ACE_Streambuf::put_avail (void)
{
- return this->pptr_saved_ - this->pbase_saved_;
+ return this->pptr_saved_ - this->pbase_saved_;
}
-char *
-ACE_Streambuf::reset_get_buffer (char * newBuffer, u_int _streambuf_size, u_int _gptr, u_int _egptr)
-//
// Typical usage:
//
// u_int newGptr = otherStream->get_waiting ();
@@ -495,11 +501,16 @@ ACE_Streambuf::reset_get_buffer (char * newBuffer, u_int _streambuf_size, u_int
//
// 'myStream' now has the get buffer of 'otherStream' and can use it in any way.
// 'otherStream' now has a new, empty get buffer.
-//
+
+char *
+ACE_Streambuf::reset_get_buffer (char *newBuffer,
+ u_int _streambuf_size,
+ u_int _gptr,
+ u_int _egptr)
{
char * rval = this->eback_saved_;
- // The get area is where the iostrem will get data from. This is
+ // The get area is where the iostream will get data from. This is
// our read buffer. There are three pointers which describe the
// read buffer:
//
@@ -516,15 +527,13 @@ ACE_Streambuf::reset_get_buffer (char * newBuffer, u_int _streambuf_size, u_int
// of our read-dedicated buffer.
//
if (newBuffer)
- {
- if (streambuf_size_ != _streambuf_size)
- return NULL;
- this->eback_saved_ = newBuffer;
- }
+ {
+ if (streambuf_size_ != _streambuf_size)
+ return NULL;
+ this->eback_saved_ = newBuffer;
+ }
else
- {
- ACE_NEW_RETURN (this->eback_saved_, char[streambuf_size_], 0);
- }
+ ACE_NEW_RETURN (this->eback_saved_, char[streambuf_size_], 0);
this->gptr_saved_ = this->eback_saved_ + _gptr;
this->egptr_saved_ = this->eback_saved_ + _egptr;
@@ -538,17 +547,18 @@ ACE_Streambuf::reset_get_buffer (char * newBuffer, u_int _streambuf_size, u_int
return rval;
}
-char *
-ACE_Streambuf::reset_put_buffer (char * newBuffer, u_int _streambuf_size, u_int _pptr)
-//
// Typical usage:
//
// u_int newPptr = otherStream->put_avail ();
// char * newBuf = otherStream->reset_put_buffer ();
// char * oldputbuf = otherStream->reset_put_buffer (newBuf, otherStream->streambuf_size (), newPptr);
-//
+
+char *
+ACE_Streambuf::reset_put_buffer (char *newBuffer,
+ u_int _streambuf_size,
+ u_int _pptr)
{
- char * rval = this->pbase_saved_;
+ char *rval = this->pbase_saved_;
// The put area is where the iostream will put data that needs to be
// sent to the peer. This becomes our write buffer. The three
@@ -564,15 +574,13 @@ ACE_Streambuf::reset_put_buffer (char * newBuffer, u_int _streambuf_size, u_int
// these three pointers.
//
if (newBuffer)
- {
- if (streambuf_size_ != _streambuf_size)
- return NULL;
- this->pbase_saved_ = newBuffer;
- }
+ {
+ if (streambuf_size_ != _streambuf_size)
+ return NULL;
+ this->pbase_saved_ = newBuffer;
+ }
else
- {
- ACE_NEW_RETURN (this->pbase_saved_, char[streambuf_size_], 0);
- }
+ ACE_NEW_RETURN (this->pbase_saved_, char[streambuf_size_], 0);
this->pptr_saved_ = this->pbase_saved_ + _pptr;
this->epptr_saved_ = this->pbase_saved_ + streambuf_size_;
@@ -612,5 +620,4 @@ ACE_Streambuf::~ACE_Streambuf (void)
}
#endif /* !ACE_LACKS_ACE_IOSTREAM */
-
#endif /* ACE_IOSTREAM_C */