56 lines
1.3 KiB
Plaintext
56 lines
1.3 KiB
Plaintext
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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#include "config.h"
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#include "channel.h"
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typedef _Bool bool;
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typedef unsigned char byte;
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typedef struct __go_channel chan;
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/* Do a channel receive with closed status. */
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func chanrecv2(c *chan, val *byte) (received bool) {
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uintptr_t element_size = c->element_type->__size;
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if (element_size > 8) {
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return __go_receive_big(c, val, 0);
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} else {
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union {
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char b[8];
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uint64_t v;
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} u;
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u.v = __go_receive_small_closed(c, 0, &received);
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#ifndef WORDS_BIGENDIAN
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__builtin_memcpy(val, u.b, element_size);
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#else
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__builtin_memcpy(val, u.b + 8 - element_size, element_size);
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#endif
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return received;
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}
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}
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/* Do a channel receive with closed status for a select statement. */
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func chanrecv3(c *chan, val *byte) (received bool) {
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uintptr_t element_size = c->element_type->__size;
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if (element_size > 8) {
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return __go_receive_big(c, val, 1);
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} else {
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union {
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char b[8];
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uint64_t v;
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} u;
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u.v = __go_receive_small_closed(c, 1, &received);
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#ifndef WORDS_BIGENDIAN
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__builtin_memcpy(val, u.b, element_size);
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#else
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__builtin_memcpy(val, u.b + 8 - element_size, element_size);
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#endif
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return received;
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}
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}
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