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LibPthread: Partially implement pthread_cleanup_(push pop)
These are also supposed to run on cancellation, but we don't support cancellation.
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1 changed files with 15 additions and 4 deletions
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@ -9,6 +9,7 @@
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#include <AK/Debug.h>
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#include <AK/Format.h>
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#include <AK/StdLibExtras.h>
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#include <AK/Vector.h>
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#include <Kernel/API/Syscall.h>
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#include <LibSystem/syscall.h>
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#include <bits/pthread_integration.h>
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@ -37,6 +38,12 @@ static constexpr size_t highest_reasonable_stack_size = 8 * MiB; // That's the d
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__thread void* s_stack_location;
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__thread size_t s_stack_size;
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struct CleanupHandler {
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void (*function)(void*) { nullptr };
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void* argument { nullptr };
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};
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thread_local Vector<CleanupHandler> s_cleanup_handlers {};
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#define __RETURN_PTHREAD_ERROR(rc) \
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return ((rc) < 0 ? -(rc) : 0)
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@ -139,19 +146,23 @@ int pthread_create(pthread_t* thread, pthread_attr_t* attributes, void* (*start_
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// https://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_exit.html
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void pthread_exit(void* value_ptr)
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{
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while (!s_cleanup_handlers.is_empty())
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pthread_cleanup_pop(1);
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exit_thread(value_ptr, s_stack_location, s_stack_size);
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}
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// https://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_cleanup_push.html
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void pthread_cleanup_push([[maybe_unused]] void (*routine)(void*), [[maybe_unused]] void* arg)
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void pthread_cleanup_push(void (*routine)(void*), void* arg)
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{
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TODO();
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s_cleanup_handlers.empend(routine, arg);
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}
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// https://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_cleanup_pop.html
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void pthread_cleanup_pop([[maybe_unused]] int execute)
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void pthread_cleanup_pop(int execute)
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{
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TODO();
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auto entry = s_cleanup_handlers.take_last();
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if (execute != 0)
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entry.function(entry.argument);
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}
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// https://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_join.html
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