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0a24b4fc3c
The *NSYNC linked list API is good enough that it deserves to be part of the C libray, so this change writes an improved version of it which uses that offsetof() trick from the Linux Kernel. We vendor all of the *NSYNC tests in third_party which helped confirm the needed refactoring is safe This change also deletes more old code that didn't pan out. My goal here is to work towards a vision where the Cosmopolitan core libraries become less experimental and more focused on curation. This better reflects the current level of quality we've managed to achieve.
26 lines
1.1 KiB
C
26 lines
1.1 KiB
C
#ifndef COSMOPOLITAN_LIBC_THREAD_WAIT_INTERNAL_H_
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#define COSMOPOLITAN_LIBC_THREAD_WAIT_INTERNAL_H_
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#include "libc/intrin/dll.h"
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#include "third_party/nsync/atomic.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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/* Implementations of "struct nsync_waitable_s" must provide functions
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in struct nsync_waitable_funcs_s (see public/nsync_wait.h). When
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nsync_wait_n() waits on a client's object, those functions are called
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with v pointing to the client's object and nw pointing to a struct
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nsync_waiter_s. */
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struct nsync_waiter_s {
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uint32_t tag; /* used for debugging */
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uint32_t flags; /* see below */
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struct Dll q; /* used to link children of parent */
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nsync_atomic_uint32_ waiting; /* non-zero <=> the waiter is waiting */
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struct nsync_semaphore_s_ *sem; /* *sem will be Ved when waiter is woken */
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};
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/* set if waiter is embedded in Mu/CV's internal structures */
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#define NSYNC_WAITER_FLAG_MUCV 0x1
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_THREAD_WAIT_INTERNAL_H_ */
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