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Todd Eisenberger 0ab680dd7f [runtime][threads] Improve documentation in exit/join path

This is in response to Roland's comments on c/34674.

Change-Id: I13bda8c36820f87cc35732d8823a0d7a61fe50ba

2017-06-20 22:20:21 +00:00

mx_futex_wake

NAME

futex_wake - Wake some number of threads waiting on a futex.

#include <magenta/syscalls.h>

mx_status_t mx_futex_wake(const mx_futex_t* value_ptr, uint32_t wake_count);

Waking a futex causes wake_count threads waiting on the value_ptr futex to be woken up.

Waking up zero threads is not an error condition. Passing in an unallocated address for value_ptr is not an error condition.

futex_wake() returns MX_OK on success.

MX_ERR_INVALID_ARGS value_ptr is not aligned.