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- jessie 3.16.56-1+deb8u1
EVENTFD_CTX_READ(9) | Events based on file descripto | EVENTFD_CTX_READ(9) |
NAME¶
eventfd_ctx_read - Reads the eventfd counter or wait if it is zero.SYNOPSIS¶
ssize_t
eventfd_ctx_read(struct eventfd_ctx * ctx,
int no_wait,
__u64 * cnt);
ARGUMENTS¶
ctx[in] Pointer to eventfd context.
no_wait
[in] Different from zero if the operation should not
block.
cnt
[out] Pointer to the 64-bit counter value.
DESCRIPTION¶
Returns 0 if successful, or the following error codes: -EAGAIN : The operation would have blocked but no_wait was non-zero. -ERESTARTSYS : A signal interrupted the wait operation. If no_wait is zero, the function might sleep until the eventfd internal counter becomes greater than zero.COPYRIGHT¶
May 2018 | Kernel Hackers Manual 3.16 |