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Need separate output buffers for each thread

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@860 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2008-09-01 15:56:03 +00:00
parent 6dad5e248b
commit 029d82031f
1 changed files with 30 additions and 76 deletions
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106
examples/nsh/nsh_telnetd.c
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@ -91,13 +91,10 @@
struct telnetio_s
{
sem_t tio_sem;
pid_t tio_holder;
int tio_sockfd;
uint16 tio_sndlen;
uint8 tio_bufndx;
uint8 tio_state;
uint8 tio_semnest;
char tio_buffer[CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE];
char tio_inbuffer[CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE];
};
struct redirect_s
@ -119,12 +116,14 @@ struct telnetsave_s
struct telnetd_s
{
struct nsh_vtbl_s tn_vtbl;
uint16 tn_sndlen;
boolean tn_redirected;
union
{
struct telnetio_s *tn;
struct redirect_s rd;
} u;
char tn_outbuffer[CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE];
char tn_cmd[CONFIG_EXAMPLES_NSH_LINELEN];
};
@ -132,6 +131,7 @@ struct telnetd_s
* Private Function Prototypes
****************************************************************************/
static void tio_semtake(struct telnetio_s *tio);
static FAR struct nsh_vtbl_s *nsh_telnetclone(FAR struct nsh_vtbl_s *vtbl);
static void nsh_telnetrelease(FAR struct nsh_vtbl_s *vtbl);
static int nsh_telnetoutput(FAR struct nsh_vtbl_s *vtbl, const char *fmt, ...);
@ -151,33 +151,15 @@ static void nsh_telnetexit(FAR struct nsh_vtbl_s *vtbl);
static void tio_semtake(struct telnetio_s *tio)
{
pid_t my_pid = getpid();
/* Take the semaphore (perhaps waiting) */
/* Does this task already have the semaphore? */
if (tio->tio_holder == my_pid)
while (sem_wait(&tio->tio_sem) != 0)
{
/* Yes, just increment the number of references that the task holds */
/* The only case that an error should occur here is if the wait was
* awakened by a signal.
*/
tio->tio_semnest++;
}
else
{
/* No, Take the semaphore (perhaps waiting) */
while (sem_wait(&tio->tio_sem) != 0)
{
/* The only case that an error should occur here is if the wait was
* awakened by a signal.
*/
ASSERT(errno == EINTR);
}
/* Stake the claim and return */
tio->tio_holder = my_pid;
tio->tio_semnest = 1;
ASSERT(errno == EINTR);
}
}
@ -185,31 +167,7 @@ static void tio_semtake(struct telnetio_s *tio)
* Name: tio_semgive
****************************************************************************/
static void tio_semgive(struct telnetio_s *tio)
{
pid_t my_pid = getpid();
/* I better be holding at least one count on the semaphore */
ASSERT(tio->tio_holder == my_pid);
/* Do I hold multiple references to the semphore */
if (tio->tio_semnest > 1)
{
/* Yes, just release one count and return */
tio->tio_semnest--;
}
else
{
/* Nope, this is the last reference I have */
tio->tio_holder = -1;
tio->tio_semnest = 0;
ASSERT(sem_post(&tio->tio_sem) == 0);
}
}
#define tio_semgive(tio) ASSERT(sem_post(&tio->tio_sem) == 0)
/****************************************************************************
* Name: nsh_dumpbuffer
@ -393,10 +351,12 @@ static void nsh_sendopt(struct telnetd_s *pstate, uint8 option, uint8 value)
optbuf[3] = 0;
nsh_dumpbuffer("Send optbuf", optbuf, 4);
tio_semtake(tio); /* Only one call to send at a time */
if (send(tio->tio_sockfd, optbuf, 4, 0) < 0)
{
dbg("[%d] Failed to send TELNET_IAC: %d\n", tio->tio_sockfd, errno);
}
tio_semgive(tio);
}
/****************************************************************************
@ -411,17 +371,17 @@ static void nsh_flush(FAR struct telnetd_s *pstate)
{
struct telnetio_s *tio = pstate->u.tn;
tio_semtake(tio);
if (tio->tio_sndlen > 0)
if (pstate->tn_sndlen > 0)
{
nsh_dumpbuffer("Shell output", tio->tio_buffer, tio->tio_sndlen);
if (send(tio->tio_sockfd, tio->tio_buffer, tio->tio_sndlen, 0) < 0)
nsh_dumpbuffer("Shell output", pstate->tn_outbuffer, pstate->tn_sndlen);
tio_semtake(tio); /* Only one call to send at a time */
if (send(tio->tio_sockfd, pstate->tn_outbuffer, pstate->tn_sndlen, 0) < 0)
{
dbg("[%d] Failed to send response: %d\n", tio->tio_sockfd, errno);
}
tio_semgive(tio);
}
tio->tio_sndlen = 0;
tio_semgive(tio);
pstate->tn_sndlen = 0;
}
/****************************************************************************
@ -435,10 +395,9 @@ static void nsh_flush(FAR struct telnetd_s *pstate)
static int nsh_receive(struct telnetd_s *pstate, size_t len)
{
struct telnetio_s *tio = pstate->u.tn;
char *ptr = tio->tio_buffer;
char *ptr = tio->tio_inbuffer;
uint8 ch;
tio_semtake(tio);
while (len > 0)
{
ch = *ptr++;
@ -520,7 +479,6 @@ static int nsh_receive(struct telnetd_s *pstate, size_t len)
break;
}
}
tio_semgive(tio);
return OK;
}
@ -569,13 +527,13 @@ static void *nsh_connection(void *arg)
/* Read a buffer of data from the TELNET client */
ret = recv(tio->tio_sockfd, tio->tio_buffer, CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE, 0);
ret = recv(tio->tio_sockfd, tio->tio_inbuffer, CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE, 0);
if (ret > 0)
{
/* Process the received TELNET data */
nsh_dumpbuffer("Received buffer", tio->tio_buffer, ret);
nsh_dumpbuffer("Received buffer", tio->tio_inbuffer, ret);
ret = nsh_receive(pstate, ret);
}
}
@ -618,19 +576,16 @@ static void *nsh_connection(void *arg)
static int nsh_telnetoutput(FAR struct nsh_vtbl_s *vtbl, const char *fmt, ...)
{
struct telnetd_s *pstate = (struct telnetd_s *)vtbl;
struct telnetio_s *tio = pstate->u.tn;
int nbytes = tio->tio_sndlen;
int nbytes = pstate->tn_sndlen;
int len;
va_list ap;
tio_semtake(tio);
/* Put the new info into the buffer. Here we are counting on the fact that
* no output strings will exceed CONFIG_EXAMPLES_NSH_LINELEN!
*/
va_start(ap, fmt);
vsnprintf(&tio->tio_buffer[nbytes],
vsnprintf(&pstate->tn_outbuffer[nbytes],
(CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE - 1) - nbytes, fmt, ap);
va_end(ap);
@ -638,26 +593,25 @@ static int nsh_telnetoutput(FAR struct nsh_vtbl_s *vtbl, const char *fmt, ...)
* buffered data
*/
len = strlen(&tio->tio_buffer[nbytes]);
len = strlen(&pstate->tn_outbuffer[nbytes]);
nbytes += len;
/* Expand any terminating \n to \r\n */
if (nbytes < (CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE - 2) &&
tio->tio_buffer[nbytes-1] == '\n')
pstate->tn_outbuffer[nbytes-1] == '\n')
{
tio->tio_buffer[nbytes-1] = ISO_cr;
tio->tio_buffer[nbytes] = ISO_nl;
tio->tio_buffer[nbytes+1] = '\0';
pstate->tn_outbuffer[nbytes-1] = ISO_cr;
pstate->tn_outbuffer[nbytes] = ISO_nl;
pstate->tn_outbuffer[nbytes+1] = '\0';
nbytes++;
}
tio->tio_sndlen = nbytes;
pstate->tn_sndlen = nbytes;
/* Flush to the network if the buffer does not have room for one more
* maximum length string.
*/
tio_semgive(tio);
if (nbytes > CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE - CONFIG_EXAMPLES_NSH_LINELEN)
{
nsh_flush(pstate);