libgo/runtime/go-send-nb-big.c

   1 /* go-send-nb-big.c -- nonblocking send of something big on a channel.
   2
   3    Copyright 2009 The Go Authors. All rights reserved.
   4    Use of this source code is governed by a BSD-style
   5    license that can be found in the LICENSE file.  */
   6
   7 #include <stdint.h>
   8
   9 #include "channel.h"
  10
  11 _Bool
  12 __go_send_nonblocking_big (struct __go_channel* channel, const void *val)
  13 {
  14   uintptr_t element_size;
  15   size_t alloc_size;
  16   size_t offset;
  17
  18   if (channel == NULL)
  19     return 0;
  20
  21   element_size = channel->element_type->__size;
  22   alloc_size = (element_size + sizeof (uint64_t) - 1) / sizeof (uint64_t);
  23
  24   if (!__go_send_nonblocking_acquire (channel))
  25     return 0;
  26
  27   offset = channel->next_store * alloc_size;
  28   __builtin_memcpy (&channel->data[offset], val, element_size);
  29
  30   __go_send_release (channel);
  31
  32   return 1;
  33 }