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# ====================================================================
#
# synch.cdl
#
# configuration data related to the kernel synchronization primitives
#
# ====================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
##
## eCos is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free
## Software Foundation; either version 2 or (at your option) any later version.
##
## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
## WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
## for more details.
##
## You should have received a copy of the GNU General Public License along
## with eCos; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
##
## As a special exception, if other files instantiate templates or use macros
## or inline functions from this file, or you compile this file and link it
## with other works to produce a work based on this file, this file does not
## by itself cause the resulting work to be covered by the GNU General Public
## License. However the source code for this file must still be made available
## in accordance with section (3) of the GNU General Public License.
##
## This exception does not invalidate any other reasons why a work based on
## this file might be covered by the GNU General Public License.
##
## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
## at http://sources.redhat.com/ecos/ecos-license/
## -------------------------------------------
#####ECOSGPLCOPYRIGHTEND####
# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s): jskov
# Original data: nickg
# Contributors:
# Date: 1999-07-05
#
#####DESCRIPTIONEND####
#
# ====================================================================
cdl_component CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL {
display "Priority inversion protection protocols"
flavor booldata
doc ref/kernel-mutexes.html
legal_values { "SIMPLE" }
default_value { "SIMPLE" }
active_if { CYGSEM_KERNEL_SCHED_MLQUEUE }
requires { CYGINT_KERNEL_SCHEDULER_UNIQUE_PRIORITIES == 0 }
description "
This component controls the protocols used to protect mutexes against
priority inversion. If this option is enabled it defines which
algorithm is used to implement this protection. At present only
one such algorithm is defined: \"SIMPLE\". The implementation
will only work in the mlqueue scheduler, and it does not handle the
rare case of nested mutexes completely correctly. However it is
both fast and deterministic."
cdl_option CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_INHERIT {
display "Enable priority inheritance protocol"
default_value 1
implements CYGINT_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_COUNT
description "
This option enables priority inheritance protocol. This protocol
causes the owner of a mutex to be executed at the highest priority
of the threads waiting for access to the mutex."
}
cdl_component CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING {
display "Enable priority ceiling protocol"
default_value 1
implements CYGINT_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_COUNT
description "
This option enables priority ceiling protocol. This protocol
causes the owner of a mutex to be executed at a priority
associated with the mutex."
cdl_option CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT_PRIORITY {
display "Default priority ceiling"
flavor data
legal_values 0 to { CYGNUM_KERNEL_SCHED_PRIORITIES - 1 }
default_value 0
active_if CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING
description "
This option defines the default priority ceiling to be
used if the chosen default priority inversion protocol is
priority ceoptioniling protocol. The default value for this is zero,
making all such mutexes boost threads to the maximum priority."
}
}
cdl_option CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_NONE {
display "No priority inversion protocol"
default_value 1
implements CYGINT_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_COUNT
description "
This option enables the ability to have no priority inversion protocol.
It is equivalent to disabling the priority inversion protocol at
the top level, but is necessary for the runtime and default
selection options."
}
cdl_option CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT {
display "Default priority inversion protocol"
flavor data
active_if { CYGINT_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_COUNT > 1 }
legal_values { "INHERIT" "CEILING" "NONE" }
default_value { CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_INHERIT ?
"INHERIT" :
CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING ?
"CEILING" : "NONE" }
description "
This option defines the default inversion protocol used for mutexes that
are created without an explicit protocol being specified. The protocol
chosen by default is to use priority inheritance if it is present otherwise
priority ceiling, or none if neither is present."
}
cdl_option CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DYNAMIC {
display "Specify mutex priority inversion protocol at runtime"
default_value 1
active_if { CYGINT_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_COUNT > 1 }
description "
This option controls whether the priority inversion protocol used by
a mutex can be specified when that mutex is created."
}
cdl_interface CYGINT_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_COUNT {
display "Number of protocols selected"
}
}
cdl_option CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT {
display "Message box blocking put support"
doc ref/kernel-mail-boxes.html
default_value 1
description "
Message boxes can support three different versions of the
put-message operation. The first is tryput(), which will fail
if the message box is already full. The other two are the
ordinary put() function which will block if the message box
is full, and a timed put() operation which will block for
upto a certain length of time if the message box is currently
full. The blocking versions require extra memory in the
message box data structure and extra code in the other
message box functions, so they can be disabled if the
application does not require them. If this option is enabled
then the system will always provide the blocking put()
function, and it will also provide the timed put() function
if thread timers are enabled."
}
cdl_option CYGNUM_KERNEL_SYNCH_MBOX_QUEUE_SIZE {
display "Message box queue size"
doc ref/kernel-mail-boxes.html
flavor data
legal_values 1 to 65535
default_value 10
description "
This configuration option controls the number of messages
that can be queued in a message box before a non-blocking
put() operation will fail or a blocking put() operation will
block. The cost in memory is one pointer per message box for
each possible message."
}
cdl_option CYGMFN_KERNEL_SYNCH_CONDVAR_TIMED_WAIT {
display "Condition variable timed-wait support"
doc ref/kernel-condition-variables.html
requires CYGFUN_KERNEL_THREADS_TIMER
default_value 1
description "
This option enables the condition variable timed wait
facility."
}
cdl_option CYGMFN_KERNEL_SYNCH_CONDVAR_WAIT_MUTEX {
display "Condition variable explicit mutex wait support"
doc ref/kernel-condition-variables.html
default_value 1
description "
This option enables the condition variable explicit mutex wait
facility. By default condition variables in eCos are created with
a statically associated mutex. This option permits wait (and timed wait
if CYGMFN_KERNEL_SYNCH_CONDVAR_TIMED_WAIT is enabled) to provide a
different mutex as an argument. This makes no difference to the semantics
the wait operation except that a different mutex will be used during it."
}
cdl_option CYGIMP_KERNEL_SYNCH_MQUEUE_NOT_INLINE {
display "Avoid inlines in mqueue implementation"
default_value 0
description "
With this option disabled, the 'mqueue' message queue implementation
provides most of its implementation via inlines. However this can
adversely affect code size in application that make lots of mqueue
calls from different places, so enabling this option provides
non-inline versions to be used instead."
compile sync/mqueue.cxx
}
# EOF synch.cdl
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