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Changed client <-> server interface to make less system calls.

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1998-06-18  Martin Baulig  <baulig@taurus.uni-trier.de>

	* lib/{command, write, read}.c: Changed client <-> server
	interface to make less system calls.

	* src/daemon/main.c: Changed server side of interface.

	* include/glibtop/command.h (struct _glibtop_response): New
	structure to return data from the server to the client.
This commit is contained in:
Martin Baulig
1998-06-18 10:22:39 +00:00
committed by Martin Baulig
parent d9e6288b7a
commit 2de9ea5c7d
8 changed files with 203 additions and 235 deletions
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42
lib/command.c
View File

@@ -28,27 +28,43 @@
void *
glibtop_call_l (glibtop *server, unsigned command, size_t send_size, void *send_buf,
size_t recv_size, void *recv_buf)
size_t recv_size, void *recv_buf)
{
glibtop_command *cmnd;
glibtop_command cmnd;
glibtop_response response;
void *ptr;
glibtop_init_r (&server, 0, 0);
cmnd = glibtop_calloc_r (server, 1, sizeof (glibtop_command));
memset (&cmnd, 0, sizeof (glibtop_command));
memcpy (&cmnd.server, server, sizeof (glibtop));
memcpy (&cmnd->server, server, sizeof (glibtop));
cmnd.command = command;
/* If send_size is less than _GLIBTOP_PARAM_SIZE (normally 16 Bytes), we
* send it together with command, so we only need one system call instead
* of two. */
#ifdef DEBUG
fprintf (stderr, "COMMAND: send_size = %d; command = %d; sizeof (cmnd) = %d\n",
send_size, command, sizeof (glibtop_command));
#endif
if (send_size <= _GLIBTOP_PARAM_SIZE)
memcpy (cmnd.parameter, send_buf, send_size);
else
cmnd.size = send_size;
cmnd->command = command;
cmnd->size = send_size;
glibtop_write_l (server, sizeof (glibtop_command), cmnd);
glibtop_write_l (server, sizeof (glibtop_command), &cmnd);
glibtop_write_l (server, send_size, send_buf);
glibtop_read_l (server, recv_size, recv_buf);
glibtop_read_l (server, sizeof (glibtop_response), &response);
/* glibtop_read_l (server, recv_size, recv_buf); */
ptr = glibtop_read_data_l (server);
/* ptr = glibtop_read_data_l (server); */
glibtop_free_r (server, cmnd);
return ptr;
return NULL;
}