diff options
Diffstat (limited to 'libgo/runtime/go-rec-big.c')
-rw-r--r-- | libgo/runtime/go-rec-big.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/libgo/runtime/go-rec-big.c b/libgo/runtime/go-rec-big.c new file mode 100644 index 000000000..23d65296a --- /dev/null +++ b/libgo/runtime/go-rec-big.c @@ -0,0 +1,34 @@ +/* go-rec-big.c -- receive something larger than 64 bits 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 "go-panic.h" +#include "channel.h" + +void +__go_receive_big (struct __go_channel *channel, void *val, _Bool for_select) +{ + size_t alloc_size; + size_t offset; + + if (channel == NULL) + __go_panic_msg ("receive from nil channel"); + + alloc_size = ((channel->element_size + sizeof (uint64_t) - 1) + / sizeof (uint64_t)); + + if (!__go_receive_acquire (channel, for_select)) + { + __builtin_memset (val, 0, channel->element_size); + return; + } + + offset = channel->next_fetch * alloc_size; + __builtin_memcpy (val, &channel->data[offset], channel->element_size); + + __go_receive_release (channel); +} |