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/* 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;
}
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