mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-08 03:52:30 +00:00
987c0e5fc1
Now that the API has been fixed up, replace the existing timeout queue with a much smaller version. The basic algorithm is unchanged: timeouts are stored in a sorted dlist with each node nolding a delta time from the previous node in the list; the announce call just walks this list pulling off the heads as needed. Advantages: * Properly spinlocked and SMP-aware. The earlier timer implementation relied on only CPU 0 doing timeout work, and on an irq_lock() being taken before entry (something that was violated in a few spots). Now any CPU can wake up for an event (or all of them) and everything works correctly. * The *_thread_timeout() API is now expressible as a clean wrapping (just one liners) around the lower-level interface based on function pointer callbacks. As a result the timeout objects no longer need to store backpointers to the thread and wait_q and have shrunk by 33%. * MUCH smaller, to the tune of hundreds of lines of code removed. * Future proof, in that all operations on the queue are now fronted by just two entry points (_add_timeout() and z_clock_announce()) which can easily be augmented with fancier data structures. Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
58 lines
1.4 KiB
CMake
58 lines
1.4 KiB
CMake
# kernel is a normal CMake library and not a zephyr_library because it
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# should not be --whole-archive'd
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add_library(kernel
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alert.c
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device.c
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errno.c
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idle.c
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init.c
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mailbox.c
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mem_slab.c
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mempool.c
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msg_q.c
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mutex.c
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pipes.c
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queue.c
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sched.c
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sem.c
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stack.c
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system_work_q.c
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thread.c
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thread_abort.c
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version.c
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work_q.c
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smp.c
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)
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# Kernel files has the macro __ZEPHYR_SUPERVISOR__ set so that it
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# optimizes the code when userspace is enabled.
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set_target_properties(
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kernel
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PROPERTIES
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COMPILE_DEFINITIONS
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__ZEPHYR_SUPERVISOR__
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)
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target_sources_ifdef(CONFIG_INT_LATENCY_BENCHMARK kernel PRIVATE int_latency_bench.c)
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target_sources_ifdef(CONFIG_STACK_CANARIES kernel PRIVATE compiler_stack_protect.c)
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target_sources_ifdef(CONFIG_SYS_CLOCK_EXISTS kernel PRIVATE timeout.c timer.c)
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target_sources_ifdef(CONFIG_ATOMIC_OPERATIONS_C kernel PRIVATE atomic_c.c)
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target_sources_if_kconfig( kernel PRIVATE poll.c)
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# The last 2 files inside the target_sources_ifdef should be
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# userspace_handler.c and userspace.c. If not the linker would complain.
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# This order has to be maintained. Any new file should be placed
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# above these 2 files.
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target_sources_ifdef(
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CONFIG_USERSPACE
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kernel PRIVATE
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mem_domain.c
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userspace_handler.c
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userspace.c
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)
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add_dependencies(kernel offsets_h)
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target_link_libraries(kernel zephyr_interface)
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