diff options
| -rw-r--r-- | doc/intro.9.txt | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/doc/intro.9.txt b/doc/intro.9.txt index 5af5a4e8..7a486ede 100644 --- a/doc/intro.9.txt +++ b/doc/intro.9.txt @@ -102,6 +102,10 @@ module:kern/thread:: module:kern/work:: Work queue of deferred asynchronous lightweight jobs. +All wait functions on synchronization objects can be time-bounded. +This includes waiting for a mutex lock, a condition variable, or a +semaphore. + Mutex implementations ~~~~~~~~~~~~~~~~~~~~~ @@ -134,6 +138,8 @@ module:kern/bitmap:: Arbitrary-length bit array. module:kern/cbuf:: Circular character buffer. +module:kern/clock:: + Low resolution clock. module:kern/error:: Common errors and error handling functions. module:kern/hash:: @@ -158,6 +164,8 @@ module:kern/sprintf:: Formatted string functions. module:kern/syscnt:: Generic 64-bits counter. +module:kern/timer:: + Low resolution timer. X15 doesn't provide a generic queue interface, because the requirements often vary too much. Similarly, it doesn't provide a hash table interface. @@ -202,13 +210,13 @@ TODO Write when the virtual memory system is rewritten. REAL-TIME --------- -X15 complies with almost all the requirements of a true hard real-time -multiprocessor system. It is a fully preemptible kernel with short, -bounded preemption-based critical sections. It provides real-time -scheduling policies and a complete priority inheritance algorithm. -Preemption and interrupts are clearly decoupled so that interrupts -can remain enabled as much as possible. Multiprocessor synchronization -uses rigorously fair spin locks. The modules related to real-time are : +X15 complies with all the requirements of a real-time multiprocessor +system. It is a fully preemptible kernel with short, bounded +preemption-based critical sections. It provides real-time scheduling +policies and a complete priority inheritance algorithm. Preemption and +interrupts are clearly decoupled so that interrupts can remain enabled +as much as possible. Multiprocessor synchronization uses rigorously +fair spin locks. The modules related to real-time are : module:kern/rtmutex:: Mutual exclusion with priority inheritance. |