libgo/runtime/go-send-big.c

   1 /* go-send-big.c -- send something bigger than uint64_t 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 "go-panic.h"
  10 #include "channel.h"
  11
  12 void
  13 __go_send_big (struct __go_channel* channel, const void *val, _Bool for_select)
  14 {
  15   size_t alloc_size;
  16   size_t offset;
  17
  18   if (channel == NULL)
  19     __go_panic_msg ("send to nil channel");
  20
  21   alloc_size = ((channel->element_size + sizeof (uint64_t) - 1)
  22                 / sizeof (uint64_t));
  23
  24   if (!__go_send_acquire (channel, for_select))
  25     return;
  26
  27   offset = channel->next_store * alloc_size;
  28   __builtin_memcpy (&channel->data[offset], val, channel->element_size);
  29
  30   __go_send_release (channel);
  31 }