| /* go-rec-nb-big.c -- nonblocking receive of something big on a channel. |
| |
| Copyright 2009 The Go Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style |
| license that can be found in the LICENSE file. */ |
| |
| #include <stdint.h> |
| |
| #include "channel.h" |
| |
| _Bool |
| __go_receive_nonblocking_big (struct __go_channel* channel, void *val) |
| { |
| size_t alloc_size; |
| size_t offset; |
| |
| alloc_size = ((channel->element_size + sizeof (uint64_t) - 1) |
| / sizeof (uint64_t)); |
| |
| int data = __go_receive_nonblocking_acquire (channel); |
| if (data != RECEIVE_NONBLOCKING_ACQUIRE_DATA) |
| { |
| __builtin_memset (val, 0, channel->element_size); |
| if (data == RECEIVE_NONBLOCKING_ACQUIRE_NODATA) |
| return 0; |
| else |
| { |
| /* Channel is closed. */ |
| return 1; |
| } |
| } |
| |
| offset = channel->next_fetch * alloc_size; |
| __builtin_memcpy (val, &channel->data[offset], channel->element_size); |
| |
| __go_receive_release (channel); |
| |
| return 1; |
| } |