f07df42d49
We cache the current thread ID in a thread-local variable
at thread entry, and have k_current_get() return that,
eliminating system call overhead for this API.
DL: changed _current to use z_current_get() as it is
being used during boot where TLS is not available.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
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* Copyright (c) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Thread entry
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*
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* This file provides the common thread entry function
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*/
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#include <kernel.h>
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#ifdef CONFIG_THREAD_LOCAL_STORAGE
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__thread k_tid_t z_tls_current;
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#endif
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/*
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* Common thread entry point function (used by all threads)
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*
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* This routine invokes the actual thread entry point function and passes
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* it three arguments. It also handles graceful termination of the thread
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* if the entry point function ever returns.
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*
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* This routine does not return, and is marked as such so the compiler won't
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* generate preamble code that is only used by functions that actually return.
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*/
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FUNC_NORETURN void z_thread_entry(k_thread_entry_t entry,
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void *p1, void *p2, void *p3)
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{
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#ifdef CONFIG_THREAD_LOCAL_STORAGE
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z_tls_current = z_current_get();
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#endif
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entry(p1, p2, p3);
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k_thread_abort(k_current_get());
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/*
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* Compiler can't tell that k_thread_abort() won't return and issues a
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* warning unless we tell it that control never gets this far.
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*/
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CODE_UNREACHABLE; /* LCOV_EXCL_LINE */
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}
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