Index wasi args_get args_sizes_get clock_res_get clock_time_get environ_get environ_sizes_get fd_advise fd_allocate fd_close fd_datasync fd_fdstat_get fd_fdstat_set_flags fd_fdstat_set_rights fd_filestat_get fd_filestat_set_size fd_filestat_set_times fd_pread fd_prestat_dir_name fd_prestat_get fd_pwrite fd_read fd_readdir fd_renumber fd_seek fd_sync fd_tell fd_write file_stat_flags filestat iovec lookup_flags path_create_directory path_filestat_get path_filestat_set_times path_link path_open path_readlink path_remove_directory path_rename path_symlink path_unlink_file poll_oneoff proc_exit proc_raise random_get sched_yield sock_accept sock_recv sock_send sock_shutdown
sched_yield (
) =>
error: i32 

Yields the execution of the current thread.

The sched_yield() function is used to yield the execution of the current thread, allowing other threads to run. When called, the current thread voluntarily gives up the CPU and goes into a "yielded" state, allowing the scheduler to schedule another thread for execution.

This function is similar to the POSIX sched_yield() function, which allows a thread to give up its current time slice and move to the end of the scheduling queue.

Notes

  • The sched_yield() function provides a way for a thread to voluntarily relinquish the CPU and allow other threads to run. It is particularly useful in situations where threads with lower priority need to be given an opportunity to execute.
  • When called, the sched_yield() function does not guarantee that another thread will be immediately scheduled for execution. The actual behavior depends on the underlying scheduler and the scheduling policies in place.
  • This function is typically used in multi-threaded environments where multiple threads share the same CPU resources. By yielding the execution, a thread can give other threads a chance to make progress and prevent excessive monopolization of CPU time by a single thread.
  • The sched_yield() function is a cooperative mechanism and relies on the underlying scheduler to schedule threads fairly. It is not intended for precise control over thread execution order or timing.
  • The exact behavior of sched_yield() may vary depending on the specific runtime environment and underlying operating system. It is important to consult the documentation or specifications of the specific environment to understand its behavior in that context.

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