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   size_t alloc_size;
  15   size_t offset;
  16
  17   alloc_size = ((channel->element_size + sizeof (uint64_t) - 1)
  18                 / sizeof (uint64_t));
  19
  20   int data = __go_send_nonblocking_acquire (channel);
  21   if (data != SEND_NONBLOCKING_ACQUIRE_SPACE)
  22     return data == SEND_NONBLOCKING_ACQUIRE_CLOSED;
  23
  24   offset = channel->next_store * alloc_size;
  25   __builtin_memcpy (&channel->data[offset], val, channel->element_size);
  26
  27   __go_send_release (channel);
  28
  29   return 1;
  30 }