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futex_requeue_single_owner.md

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zx_futex_requeue_single_owner

NAME

futex_requeue_single_owner - Wake some number of threads waiting on a futex, and move more waiters to another wait queue.

SYNOPSIS

#include <zircon/syscalls.h>

zx_status_t zx_futex_requeue_single_owner(const zx_futex_t* value_ptr,
                                          zx_futex_t current_value,
                                          const zx_futex_t* requeue_ptr,
                                          uint32_t requeue_count,
                                          zx_handle_t new_requeue_owner);

DESCRIPTION

See zx_futex_requeue() for a full description.

RIGHTS

None.

RETURN VALUE

zx_futex_requeue_single_owner() returns ZX_OK on success.

ERRORS

ZX_ERR_INVALID_ARGS One of the following is true:

  • Either value_ptr or requeue_ptr is not a valid userspace pointer
  • Either value_ptr or requeue_ptr is not aligned to a sizeof(zx_futex_t) boundary.
  • value_ptr is the same futex as requeue_ptr
  • new_requeue_owner is currently a member of the waiters for either value_ptr or requeue_ptr

ZX_ERR_BAD_HANDLE new_requeue_owner is not ZX_HANDLE_INVALID, and not a valid handle. ZX_ERR_WRONG_TYPE new_requeue_owner is a valid handle, but is not a handle to a thread. ZX_ERR_BAD_STATE current_value does not match the value at value_ptr.

SEE ALSO