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sim: dv-sockser: add a write buffer variant 

Rather than having to bang out chunks of data one byte at a time over
the socket interface, add a write variant that accepts an arbitrarily
long buffer.  This speeds things up considerably when we have many
chars to send out at once.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2010-11-16 19:10:29 +00:00
parent 6fc6ea198c
commit 6ab5626b08
3 changed files with 18 additions and 4 deletions
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6
sim/common/ChangeLog
View File

@ -1,3 +1,9 @@
2010-11-16 Mike Frysinger <vapier@gentoo.org>
* dv-sockser.c (dv_sockser_write_buffer): New function.
(dv_sockser_write): Rewrite to use dv_sockser_write_buffer.
* dv-sockser.h (dv_sockser_write_buffer): New prototype.
2010-10-07 Hans-Peter Nilsson <hp@axis.com>
* callback.c (os_lseek): Call wrap on lseek result.

15
sim/common/dv-sockser.c
View File

@ -346,13 +346,14 @@ dv_sockser_status (SIM_DESC sd)
}
int
dv_sockser_write (SIM_DESC sd, unsigned char c)
dv_sockser_write_buffer (SIM_DESC sd, const unsigned char *buffer,
unsigned nr_bytes)
{
int n;
if (! connected_p (sd))
return -1;
n = write (sockser_fd, &c, 1);
n = write (sockser_fd, buffer, nr_bytes);
if (n == -1)
{
if (errno == EPIPE)
@ -362,9 +363,15 @@ dv_sockser_write (SIM_DESC sd, unsigned char c)
}
return -1;
}
if (n != 1)
if (n != nr_bytes)
return -1;
return 1;
return nr_bytes;
}
int
dv_sockser_write (SIM_DESC sd, unsigned char c)
{
return dv_sockser_write_buffer (sd, &c, 1);
}
int

1
sim/common/dv-sockser.h
View File

@ -27,6 +27,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* FIXME: later add a device ptr arg */
extern int dv_sockser_status (SIM_DESC);
int dv_sockser_write (SIM_DESC, unsigned char);
int dv_sockser_write_buffer (SIM_DESC, const unsigned char *, unsigned);
int dv_sockser_read (SIM_DESC);
#endif /* DV_SOCKSER_H */