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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libgo/runtime/go-rec-nb-big.c | |
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Diffstat (limited to 'libgo/runtime/go-rec-nb-big.c')
-rw-r--r-- | libgo/runtime/go-rec-nb-big.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libgo/runtime/go-rec-nb-big.c b/libgo/runtime/go-rec-nb-big.c new file mode 100644 index 000000000..53ffe48ab --- /dev/null +++ b/libgo/runtime/go-rec-nb-big.c @@ -0,0 +1,39 @@ +/* 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; +} |