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Split initialization and reserve resources from termios to reduce

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size of mininum application.
This commit is contained in:
Joel Sherrill
1999-05-27 16:11:52 +00:00
parent 1d1b1507a6
commit 5adf355aa3
10 changed files with 281 additions and 178 deletions
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74
c/src/exec/libcsupport/src/termios.c
View File

@@ -141,54 +141,10 @@ struct rtems_termios_tty {
#define FL_MDXON 0x200 /* input controlled with XON/XOFF protocol */ #define FL_MDXON 0x200 /* input controlled with XON/XOFF protocol */
#define FL_MDXOF 0x400 /* output controlled with XON/XOFF protocol */ #define FL_MDXOF 0x400 /* output controlled with XON/XOFF protocol */
static struct rtems_termios_tty *ttyHead, *ttyTail; extern struct rtems_termios_tty *rtems_termios_ttyHead;
static rtems_id ttyMutex; extern struct rtems_termios_tty *rtems_termios_ttyTail;
extern rtems_id rtems_termios_ttyMutex;
/*
* Reserve enough resources to open every physical device once.
*/
static int first_time; /* assumed to be zeroed by BSS initialization */
void
rtems_termios_reserve_resources (
rtems_configuration_table *configuration,
rtems_unsigned32 number_of_devices
)
{
rtems_api_configuration_table *rtems_config;
if (!configuration)
rtems_fatal_error_occurred (0xFFF0F001);
rtems_config = configuration->RTEMS_api_configuration;
if (!rtems_config)
rtems_fatal_error_occurred (0xFFF0F002);
if (!first_time)
rtems_config->maximum_semaphores += 1;
first_time = 1;
rtems_config->maximum_semaphores += (4 * number_of_devices);
}
void
rtems_termios_initialize (void)
{
rtems_status_code sc;
/*
* Create the mutex semaphore for the tty list
*/
if (!ttyMutex) {
sc = rtems_semaphore_create (
rtems_build_name ('T', 'R', 'm', 'i'),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&ttyMutex);
if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc);
}
}
/* /*
* Open a termios device * Open a termios device
*/ */
@@ -207,10 +163,10 @@ rtems_termios_open (
/* /*
* See if the device has already been opened * See if the device has already been opened
*/ */
sc = rtems_semaphore_obtain (ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); sc = rtems_semaphore_obtain (rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL) if (sc != RTEMS_SUCCESSFUL)
return sc; return sc;
for (tty = ttyHead ; tty != NULL ; tty = tty->forw) { for (tty = rtems_termios_ttyHead ; tty != NULL ; tty = tty->forw) {
if ((tty->major == major) && (tty->minor == minor)) if ((tty->major == major) && (tty->minor == minor))
break; break;
} }
@@ -222,13 +178,13 @@ rtems_termios_open (
*/ */
tty = calloc (1, sizeof (struct rtems_termios_tty)); tty = calloc (1, sizeof (struct rtems_termios_tty));
if (tty == NULL) { if (tty == NULL) {
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_NO_MEMORY; return RTEMS_NO_MEMORY;
} }
tty->forw = ttyHead; tty->forw = rtems_termios_ttyHead;
ttyHead = tty; rtems_termios_ttyHead = tty;
if (ttyTail == NULL) if (rtems_termios_ttyTail == NULL)
ttyTail = tty; rtems_termios_ttyTail = tty;
tty->minor = minor; tty->minor = minor;
tty->major = major; tty->major = major;
@@ -317,7 +273,7 @@ rtems_termios_open (
args->iop->data1 = tty; args->iop->data1 = tty;
if (!tty->refcount++ && tty->device.firstOpen) if (!tty->refcount++ && tty->device.firstOpen)
(*tty->device.firstOpen)(major, minor, arg); (*tty->device.firstOpen)(major, minor, arg);
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_SUCCESSFUL; return RTEMS_SUCCESSFUL;
} }
@@ -353,7 +309,7 @@ rtems_termios_close (void *arg)
struct rtems_termios_tty *tty = args->iop->data1; struct rtems_termios_tty *tty = args->iop->data1;
rtems_status_code sc; rtems_status_code sc;
sc = rtems_semaphore_obtain (ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); sc = rtems_semaphore_obtain (rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL) if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc); rtems_fatal_error_occurred (sc);
if (--tty->refcount == 0) { if (--tty->refcount == 0) {
@@ -361,11 +317,11 @@ rtems_termios_close (void *arg)
if (tty->device.lastClose) if (tty->device.lastClose)
(*tty->device.lastClose)(tty->major, tty->minor, arg); (*tty->device.lastClose)(tty->major, tty->minor, arg);
if (tty->forw == NULL) if (tty->forw == NULL)
ttyTail = tty->back; rtems_termios_ttyTail = tty->back;
else else
tty->forw->back = tty->back; tty->forw->back = tty->back;
if (tty->back == NULL) if (tty->back == NULL)
ttyHead = tty->forw; rtems_termios_ttyHead = tty->forw;
else else
tty->back->forw = tty->forw; tty->back->forw = tty->forw;
rtems_semaphore_delete (tty->isem); rtems_semaphore_delete (tty->isem);
@@ -375,7 +331,7 @@ rtems_termios_close (void *arg)
rtems_semaphore_delete (tty->rawInBufSemaphore); rtems_semaphore_delete (tty->rawInBufSemaphore);
free (tty); free (tty);
} }
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_SUCCESSFUL; return RTEMS_SUCCESSFUL;
} }

50
c/src/exec/libcsupport/src/termiosinitialize.c Normal file
View File

@@ -0,0 +1,50 @@
/*
* Termios initialization routine
*
* Author:
* W. Eric Norum
* Saskatchewan Accelerator Laboratory
* University of Saskatchewan
* Saskatoon, Saskatchewan, CANADA
* eric@skatter.usask.ca
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <rtems.h>
#include <rtems/libio.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
struct rtems_termios_tty *rtems_termios_ttyHead;
struct rtems_termios_tty *rtems_termios_ttyTail;
rtems_id rtems_termios_ttyMutex;
void
rtems_termios_initialize (void)
{
rtems_status_code sc;
/*
* Create the mutex semaphore for the tty list
*/
if (!rtems_termios_ttyMutex) {
sc = rtems_semaphore_create (
rtems_build_name ('T', 'R', 'm', 'i'),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&rtems_termios_ttyMutex);
if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc);
}
}

28
c/src/exec/libcsupport/src/termiosreserveresources.c Normal file
View File

@@ -0,0 +1,28 @@
/*
* Reserve enough resources to open every physical device once.
*
* $Id$
*/
#include <rtems.h>
static int first_time; /* assumed to be zeroed by BSS initialization */
void rtems_termios_reserve_resources (
rtems_configuration_table *configuration,
rtems_unsigned32 number_of_devices
)
{
rtems_api_configuration_table *rtems_config;
if (!configuration)
rtems_fatal_error_occurred (0xFFF0F001);
rtems_config = configuration->RTEMS_api_configuration;
if (!rtems_config)
rtems_fatal_error_occurred (0xFFF0F002);
if (!first_time)
rtems_config->maximum_semaphores += 1;
first_time = 1;
rtems_config->maximum_semaphores += (4 * number_of_devices);
}

3
c/src/lib/libc/Makefile.in
View File

@@ -28,7 +28,8 @@ IMFS_PIECES= imfs_chown imfs_creat imfs_directory imfs_eval imfs_free \
imfs_readlink imfs_fdatasync imfs_readlink imfs_fdatasync
TERMIOS_PIECES= cfgetispeed cfgetospeed cfsetispeed cfsetospeed \ TERMIOS_PIECES= cfgetispeed cfgetospeed cfsetispeed cfsetospeed \
tcgetattr tcsetattr tcdrain termios tcgetattr tcsetattr tcdrain termios termiosinitialize \
termiosreserveresources
SYSTEM_CALL_PIECES=\ SYSTEM_CALL_PIECES=\
open close read write lseek ioctl \ open close read write lseek ioctl \

74
c/src/lib/libc/termios.c
View File

@@ -141,54 +141,10 @@ struct rtems_termios_tty {
#define FL_MDXON 0x200 /* input controlled with XON/XOFF protocol */ #define FL_MDXON 0x200 /* input controlled with XON/XOFF protocol */
#define FL_MDXOF 0x400 /* output controlled with XON/XOFF protocol */ #define FL_MDXOF 0x400 /* output controlled with XON/XOFF protocol */
static struct rtems_termios_tty *ttyHead, *ttyTail; extern struct rtems_termios_tty *rtems_termios_ttyHead;
static rtems_id ttyMutex; extern struct rtems_termios_tty *rtems_termios_ttyTail;
extern rtems_id rtems_termios_ttyMutex;
/*
* Reserve enough resources to open every physical device once.
*/
static int first_time; /* assumed to be zeroed by BSS initialization */
void
rtems_termios_reserve_resources (
rtems_configuration_table *configuration,
rtems_unsigned32 number_of_devices
)
{
rtems_api_configuration_table *rtems_config;
if (!configuration)
rtems_fatal_error_occurred (0xFFF0F001);
rtems_config = configuration->RTEMS_api_configuration;
if (!rtems_config)
rtems_fatal_error_occurred (0xFFF0F002);
if (!first_time)
rtems_config->maximum_semaphores += 1;
first_time = 1;
rtems_config->maximum_semaphores += (4 * number_of_devices);
}
void
rtems_termios_initialize (void)
{
rtems_status_code sc;
/*
* Create the mutex semaphore for the tty list
*/
if (!ttyMutex) {
sc = rtems_semaphore_create (
rtems_build_name ('T', 'R', 'm', 'i'),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&ttyMutex);
if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc);
}
}
/* /*
* Open a termios device * Open a termios device
*/ */
@@ -207,10 +163,10 @@ rtems_termios_open (
/* /*
* See if the device has already been opened * See if the device has already been opened
*/ */
sc = rtems_semaphore_obtain (ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); sc = rtems_semaphore_obtain (rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL) if (sc != RTEMS_SUCCESSFUL)
return sc; return sc;
for (tty = ttyHead ; tty != NULL ; tty = tty->forw) { for (tty = rtems_termios_ttyHead ; tty != NULL ; tty = tty->forw) {
if ((tty->major == major) && (tty->minor == minor)) if ((tty->major == major) && (tty->minor == minor))
break; break;
} }
@@ -222,13 +178,13 @@ rtems_termios_open (
*/ */
tty = calloc (1, sizeof (struct rtems_termios_tty)); tty = calloc (1, sizeof (struct rtems_termios_tty));
if (tty == NULL) { if (tty == NULL) {
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_NO_MEMORY; return RTEMS_NO_MEMORY;
} }
tty->forw = ttyHead; tty->forw = rtems_termios_ttyHead;
ttyHead = tty; rtems_termios_ttyHead = tty;
if (ttyTail == NULL) if (rtems_termios_ttyTail == NULL)
ttyTail = tty; rtems_termios_ttyTail = tty;
tty->minor = minor; tty->minor = minor;
tty->major = major; tty->major = major;
@@ -317,7 +273,7 @@ rtems_termios_open (
args->iop->data1 = tty; args->iop->data1 = tty;
if (!tty->refcount++ && tty->device.firstOpen) if (!tty->refcount++ && tty->device.firstOpen)
(*tty->device.firstOpen)(major, minor, arg); (*tty->device.firstOpen)(major, minor, arg);
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_SUCCESSFUL; return RTEMS_SUCCESSFUL;
} }
@@ -353,7 +309,7 @@ rtems_termios_close (void *arg)
struct rtems_termios_tty *tty = args->iop->data1; struct rtems_termios_tty *tty = args->iop->data1;
rtems_status_code sc; rtems_status_code sc;
sc = rtems_semaphore_obtain (ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); sc = rtems_semaphore_obtain (rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL) if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc); rtems_fatal_error_occurred (sc);
if (--tty->refcount == 0) { if (--tty->refcount == 0) {
@@ -361,11 +317,11 @@ rtems_termios_close (void *arg)
if (tty->device.lastClose) if (tty->device.lastClose)
(*tty->device.lastClose)(tty->major, tty->minor, arg); (*tty->device.lastClose)(tty->major, tty->minor, arg);
if (tty->forw == NULL) if (tty->forw == NULL)
ttyTail = tty->back; rtems_termios_ttyTail = tty->back;
else else
tty->forw->back = tty->back; tty->forw->back = tty->back;
if (tty->back == NULL) if (tty->back == NULL)
ttyHead = tty->forw; rtems_termios_ttyHead = tty->forw;
else else
tty->back->forw = tty->forw; tty->back->forw = tty->forw;
rtems_semaphore_delete (tty->isem); rtems_semaphore_delete (tty->isem);
@@ -375,7 +331,7 @@ rtems_termios_close (void *arg)
rtems_semaphore_delete (tty->rawInBufSemaphore); rtems_semaphore_delete (tty->rawInBufSemaphore);
free (tty); free (tty);
} }
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_SUCCESSFUL; return RTEMS_SUCCESSFUL;
} }

50
c/src/lib/libc/termiosinitialize.c Normal file
View File

@@ -0,0 +1,50 @@
/*
* Termios initialization routine
*
* Author:
* W. Eric Norum
* Saskatchewan Accelerator Laboratory
* University of Saskatchewan
* Saskatoon, Saskatchewan, CANADA
* eric@skatter.usask.ca
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <rtems.h>
#include <rtems/libio.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
struct rtems_termios_tty *rtems_termios_ttyHead;
struct rtems_termios_tty *rtems_termios_ttyTail;
rtems_id rtems_termios_ttyMutex;
void
rtems_termios_initialize (void)
{
rtems_status_code sc;
/*
* Create the mutex semaphore for the tty list
*/
if (!rtems_termios_ttyMutex) {
sc = rtems_semaphore_create (
rtems_build_name ('T', 'R', 'm', 'i'),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&rtems_termios_ttyMutex);
if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc);
}
}

28
c/src/lib/libc/termiosreserveresources.c Normal file
View File

@@ -0,0 +1,28 @@
/*
* Reserve enough resources to open every physical device once.
*
* $Id$
*/
#include <rtems.h>
static int first_time; /* assumed to be zeroed by BSS initialization */
void rtems_termios_reserve_resources (
rtems_configuration_table *configuration,
rtems_unsigned32 number_of_devices
)
{
rtems_api_configuration_table *rtems_config;
if (!configuration)
rtems_fatal_error_occurred (0xFFF0F001);
rtems_config = configuration->RTEMS_api_configuration;
if (!rtems_config)
rtems_fatal_error_occurred (0xFFF0F002);
if (!first_time)
rtems_config->maximum_semaphores += 1;
first_time = 1;
rtems_config->maximum_semaphores += (4 * number_of_devices);
}

74
cpukit/libcsupport/src/termios.c
View File

@@ -141,54 +141,10 @@ struct rtems_termios_tty {
#define FL_MDXON 0x200 /* input controlled with XON/XOFF protocol */ #define FL_MDXON 0x200 /* input controlled with XON/XOFF protocol */
#define FL_MDXOF 0x400 /* output controlled with XON/XOFF protocol */ #define FL_MDXOF 0x400 /* output controlled with XON/XOFF protocol */
static struct rtems_termios_tty *ttyHead, *ttyTail; extern struct rtems_termios_tty *rtems_termios_ttyHead;
static rtems_id ttyMutex; extern struct rtems_termios_tty *rtems_termios_ttyTail;
extern rtems_id rtems_termios_ttyMutex;
/*
* Reserve enough resources to open every physical device once.
*/
static int first_time; /* assumed to be zeroed by BSS initialization */
void
rtems_termios_reserve_resources (
rtems_configuration_table *configuration,
rtems_unsigned32 number_of_devices
)
{
rtems_api_configuration_table *rtems_config;
if (!configuration)
rtems_fatal_error_occurred (0xFFF0F001);
rtems_config = configuration->RTEMS_api_configuration;
if (!rtems_config)
rtems_fatal_error_occurred (0xFFF0F002);
if (!first_time)
rtems_config->maximum_semaphores += 1;
first_time = 1;
rtems_config->maximum_semaphores += (4 * number_of_devices);
}
void
rtems_termios_initialize (void)
{
rtems_status_code sc;
/*
* Create the mutex semaphore for the tty list
*/
if (!ttyMutex) {
sc = rtems_semaphore_create (
rtems_build_name ('T', 'R', 'm', 'i'),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&ttyMutex);
if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc);
}
}
/* /*
* Open a termios device * Open a termios device
*/ */
@@ -207,10 +163,10 @@ rtems_termios_open (
/* /*
* See if the device has already been opened * See if the device has already been opened
*/ */
sc = rtems_semaphore_obtain (ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); sc = rtems_semaphore_obtain (rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL) if (sc != RTEMS_SUCCESSFUL)
return sc; return sc;
for (tty = ttyHead ; tty != NULL ; tty = tty->forw) { for (tty = rtems_termios_ttyHead ; tty != NULL ; tty = tty->forw) {
if ((tty->major == major) && (tty->minor == minor)) if ((tty->major == major) && (tty->minor == minor))
break; break;
} }
@@ -222,13 +178,13 @@ rtems_termios_open (
*/ */
tty = calloc (1, sizeof (struct rtems_termios_tty)); tty = calloc (1, sizeof (struct rtems_termios_tty));
if (tty == NULL) { if (tty == NULL) {
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_NO_MEMORY; return RTEMS_NO_MEMORY;
} }
tty->forw = ttyHead; tty->forw = rtems_termios_ttyHead;
ttyHead = tty; rtems_termios_ttyHead = tty;
if (ttyTail == NULL) if (rtems_termios_ttyTail == NULL)
ttyTail = tty; rtems_termios_ttyTail = tty;
tty->minor = minor; tty->minor = minor;
tty->major = major; tty->major = major;
@@ -317,7 +273,7 @@ rtems_termios_open (
args->iop->data1 = tty; args->iop->data1 = tty;
if (!tty->refcount++ && tty->device.firstOpen) if (!tty->refcount++ && tty->device.firstOpen)
(*tty->device.firstOpen)(major, minor, arg); (*tty->device.firstOpen)(major, minor, arg);
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_SUCCESSFUL; return RTEMS_SUCCESSFUL;
} }
@@ -353,7 +309,7 @@ rtems_termios_close (void *arg)
struct rtems_termios_tty *tty = args->iop->data1; struct rtems_termios_tty *tty = args->iop->data1;
rtems_status_code sc; rtems_status_code sc;
sc = rtems_semaphore_obtain (ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); sc = rtems_semaphore_obtain (rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL) if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc); rtems_fatal_error_occurred (sc);
if (--tty->refcount == 0) { if (--tty->refcount == 0) {
@@ -361,11 +317,11 @@ rtems_termios_close (void *arg)
if (tty->device.lastClose) if (tty->device.lastClose)
(*tty->device.lastClose)(tty->major, tty->minor, arg); (*tty->device.lastClose)(tty->major, tty->minor, arg);
if (tty->forw == NULL) if (tty->forw == NULL)
ttyTail = tty->back; rtems_termios_ttyTail = tty->back;
else else
tty->forw->back = tty->back; tty->forw->back = tty->back;
if (tty->back == NULL) if (tty->back == NULL)
ttyHead = tty->forw; rtems_termios_ttyHead = tty->forw;
else else
tty->back->forw = tty->forw; tty->back->forw = tty->forw;
rtems_semaphore_delete (tty->isem); rtems_semaphore_delete (tty->isem);
@@ -375,7 +331,7 @@ rtems_termios_close (void *arg)
rtems_semaphore_delete (tty->rawInBufSemaphore); rtems_semaphore_delete (tty->rawInBufSemaphore);
free (tty); free (tty);
} }
rtems_semaphore_release (ttyMutex); rtems_semaphore_release (rtems_termios_ttyMutex);
return RTEMS_SUCCESSFUL; return RTEMS_SUCCESSFUL;
} }

50
cpukit/libcsupport/src/termiosinitialize.c Normal file
View File

@@ -0,0 +1,50 @@
/*
* Termios initialization routine
*
* Author:
* W. Eric Norum
* Saskatchewan Accelerator Laboratory
* University of Saskatchewan
* Saskatoon, Saskatchewan, CANADA
* eric@skatter.usask.ca
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems.h>
#include <rtems.h>
#include <rtems/libio.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
struct rtems_termios_tty *rtems_termios_ttyHead;
struct rtems_termios_tty *rtems_termios_ttyTail;
rtems_id rtems_termios_ttyMutex;
void
rtems_termios_initialize (void)
{
rtems_status_code sc;
/*
* Create the mutex semaphore for the tty list
*/
if (!rtems_termios_ttyMutex) {
sc = rtems_semaphore_create (
rtems_build_name ('T', 'R', 'm', 'i'),
1,
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
RTEMS_NO_PRIORITY,
&rtems_termios_ttyMutex);
if (sc != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred (sc);
}
}

28
cpukit/libcsupport/src/termiosreserveresources.c Normal file
View File

@@ -0,0 +1,28 @@
/*
* Reserve enough resources to open every physical device once.
*
* $Id$
*/
#include <rtems.h>
static int first_time; /* assumed to be zeroed by BSS initialization */
void rtems_termios_reserve_resources (
rtems_configuration_table *configuration,
rtems_unsigned32 number_of_devices
)
{
rtems_api_configuration_table *rtems_config;
if (!configuration)
rtems_fatal_error_occurred (0xFFF0F001);
rtems_config = configuration->RTEMS_api_configuration;
if (!rtems_config)
rtems_fatal_error_occurred (0xFFF0F002);
if (!first_time)
rtems_config->maximum_semaphores += 1;
first_time = 1;
rtems_config->maximum_semaphores += (4 * number_of_devices);
}