f86027ffb7
This new implementation of pipes has a number of advantages over the
previous.
1. The schedule locking is eliminated both making it safer for SMP
and allowing for pipes to be used from ISR context.
2. The code used to be structured to have separate code for copying
to/from a wating thread's buffer and the pipe buffer. This had
unnecessary duplication that has been replaced with a simpler
scatter-gather copy model.
3. The manner in which the "working list" is generated has also been
simplified. It no longer tries to use the thread's queuing node.
Instead, the k_pipe_desc structure (whose instances are on the
part of the k_thread structure) has been extended to contain
additional fields including a node for use with a linked list. As
this impacts the k_thread structure, pipes are now configurable
in the kernel via CONFIG_PIPES.
Fixes #47061
Signed-off-by: Peter Mitsis <peter.mitsis@intel.com>
120 lines
2.7 KiB
CMake
120 lines
2.7 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
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# 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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# If a pre-built static library containing kernel code exists in
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# this directory, libkernel.a, link it with the application code
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# instead of building from source.
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zephyr_library_get_current_dir_lib_name(${ZEPHYR_BASE} libkernel_stem)
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set(libkernel ${CMAKE_CURRENT_SOURCE_DIR}/lib${libkernel_stem}${CMAKE_STATIC_LIBRARY_SUFFIX})
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unset(libkernel_stem)
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if(EXISTS ${libkernel})
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add_library(kernel INTERFACE)
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target_link_libraries(kernel INTERFACE ${libkernel})
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else()
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list(APPEND kernel_files
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main_weak.c
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banner.c
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device.c
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errno.c
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fatal.c
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init.c
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kheap.c
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mem_slab.c
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thread.c
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version.c
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)
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if(CONFIG_MULTITHREADING)
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list(APPEND kernel_files
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idle.c
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mailbox.c
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msg_q.c
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mutex.c
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queue.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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work.c
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sched.c
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condvar.c
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)
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if(CONFIG_SMP)
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list(APPEND kernel_files
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smp.c)
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endif()
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endif()
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if(CONFIG_XIP)
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list(APPEND kernel_files
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xip.c)
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endif()
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if(CONFIG_DEMAND_PAGING_STATS)
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list(APPEND kernel_files
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paging/statistics.c)
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endif()
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add_library(kernel ${kernel_files})
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# Kernel files has the macro __ZEPHYR_SUPERVISOR__ set so that it
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# optimizes the code when userspace is enabled.
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set_target_properties(
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kernel
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PROPERTIES
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COMPILE_DEFINITIONS
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__ZEPHYR_SUPERVISOR__
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)
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target_sources_ifdef(CONFIG_STACK_CANARIES kernel PRIVATE compiler_stack_protect.c)
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target_sources_ifdef(CONFIG_SYS_CLOCK_EXISTS kernel PRIVATE timeout.c timer.c)
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target_sources_ifdef(CONFIG_ATOMIC_OPERATIONS_C kernel PRIVATE atomic_c.c)
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target_sources_ifdef(CONFIG_MMU kernel PRIVATE mmu.c)
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target_sources_ifdef(CONFIG_POLL kernel PRIVATE poll.c)
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target_sources_ifdef(CONFIG_EVENTS kernel PRIVATE events.c)
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target_sources_ifdef(CONFIG_PIPES kernel PRIVATE pipes.c)
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target_sources_ifdef(CONFIG_SCHED_THREAD_USAGE kernel PRIVATE usage.c)
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if(${CONFIG_KERNEL_MEM_POOL})
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target_sources(kernel PRIVATE mempool.c)
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endif()
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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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futex.c
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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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if(CONFIG_CACHE_MANAGEMENT AND CONFIG_USERSPACE)
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target_sources(kernel PRIVATE cache_handlers.c)
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endif()
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target_include_directories(kernel PRIVATE
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${ZEPHYR_BASE}/kernel/include
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${ARCH_DIR}/${ARCH}/include
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)
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target_link_libraries(kernel zephyr_interface)
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endif()
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add_dependencies(kernel zephyr_generated_headers)
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unset(libkernel)
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