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Patch from Eric Norum <eric@cls.usask.ca> to include some information

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on simple binary semaphores.
This commit is contained in:
Joel Sherrill
2000-02-18 14:11:46 +00:00
parent 227aec92f0
commit edc1347ed1
1 changed files with 8 additions and 0 deletions
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doc/user/sem.t
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@@ -89,6 +89,8 @@ only be made available for acquisition by other tasks when the
outermost @code{@value{DIRPREFIX}semaphore_obtain} is matched with outermost @code{@value{DIRPREFIX}semaphore_obtain} is matched with
a @code{@value{DIRPREFIX}semaphore_release}. a @code{@value{DIRPREFIX}semaphore_release}.
Simple binary semaphores do not allow nested access and so can be used for task synchronization.
@subsection Priority Inversion @subsection Priority Inversion
@@ -190,6 +192,9 @@ the set of valid semaphore attributes:
@item @code{@value{RPREFIX}COUNTING_SEMAPHORE} - no restriction on values @item @code{@value{RPREFIX}COUNTING_SEMAPHORE} - no restriction on values
@item @code{@value{RPREFIX}SIMPLE_BINARY_SEMAPHORE} - restrict values to
0 and 1 and do not allow nested access.
@item @code{@value{RPREFIX}NO_INHERIT_PRIORITY} - do not use priority @item @code{@value{RPREFIX}NO_INHERIT_PRIORITY} - do not use priority
inheritance (default) inheritance (default)
@@ -446,6 +451,9 @@ defined by RTEMS:
@item @code{@value{RPREFIX}COUNTING_SEMAPHORE} - no restriction on values @item @code{@value{RPREFIX}COUNTING_SEMAPHORE} - no restriction on values
@item @code{@value{RPREFIX}SIMPLE_BINARY_SEMAPHORE} - restrict values to
0 and 1 and do not allow nested access.
@item @code{@value{RPREFIX}NO_INHERIT_PRIORITY} - do not use priority @item @code{@value{RPREFIX}NO_INHERIT_PRIORITY} - do not use priority
inheritance (default) inheritance (default)