src/core/iomgr/pollset_set_posix.c

/*
 *
 * Copyright 2015, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <grpc/support/port_platform.h>

#ifdef GPR_POSIX_SOCKET

#include <stdlib.h>
#include <string.h>

#include <grpc/support/alloc.h>
#include <grpc/support/useful.h>

#include "src/core/iomgr/pollset_set.h"

void
grpc_pollset_set_init (grpc_pollset_set * pollset_set)
{
  memset (pollset_set, 0, sizeof (*pollset_set));
  gpr_mu_init (&pollset_set->mu);
}

void
grpc_pollset_set_destroy (grpc_pollset_set * pollset_set)
{
  size_t i;
  gpr_mu_destroy (&pollset_set->mu);
  for (i = 0; i < pollset_set->fd_count; i++)
    {
      GRPC_FD_UNREF (pollset_set->fds[i], "pollset");
    }
  gpr_free (pollset_set->pollsets);
  gpr_free (pollset_set->fds);
}

void
grpc_pollset_set_add_pollset (grpc_exec_ctx * exec_ctx, grpc_pollset_set * pollset_set, grpc_pollset * pollset)
{
  size_t i, j;
  gpr_mu_lock (&pollset_set->mu);
  if (pollset_set->pollset_count == pollset_set->pollset_capacity)
    {
      pollset_set->pollset_capacity = GPR_MAX (8, 2 * pollset_set->pollset_capacity);
      pollset_set->pollsets = gpr_realloc (pollset_set->pollsets, pollset_set->pollset_capacity * sizeof (*pollset_set->pollsets));
    }
  pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
  for (i = 0, j = 0; i < pollset_set->fd_count; i++)
    {
      if (grpc_fd_is_orphaned (pollset_set->fds[i]))
	{
	  GRPC_FD_UNREF (pollset_set->fds[i], "pollset");
	}
      else
	{
	  grpc_pollset_add_fd (exec_ctx, pollset, pollset_set->fds[i]);
	  pollset_set->fds[j++] = pollset_set->fds[i];
	}
    }
  pollset_set->fd_count = j;
  gpr_mu_unlock (&pollset_set->mu);
}

void
grpc_pollset_set_del_pollset (grpc_exec_ctx * exec_ctx, grpc_pollset_set * pollset_set, grpc_pollset * pollset)
{
  size_t i;
  gpr_mu_lock (&pollset_set->mu);
  for (i = 0; i < pollset_set->pollset_count; i++)
    {
      if (pollset_set->pollsets[i] == pollset)
	{
	  pollset_set->pollset_count--;
	  GPR_SWAP (grpc_pollset *, pollset_set->pollsets[i], pollset_set->pollsets[pollset_set->pollset_count]);
	  break;
	}
    }
  gpr_mu_unlock (&pollset_set->mu);
}

void
grpc_pollset_set_add_fd (grpc_exec_ctx * exec_ctx, grpc_pollset_set * pollset_set, grpc_fd * fd)
{
  size_t i;
  gpr_mu_lock (&pollset_set->mu);
  if (pollset_set->fd_count == pollset_set->fd_capacity)
    {
      pollset_set->fd_capacity = GPR_MAX (8, 2 * pollset_set->fd_capacity);
      pollset_set->fds = gpr_realloc (pollset_set->fds, pollset_set->fd_capacity * sizeof (*pollset_set->fds));
    }
  GRPC_FD_REF (fd, "pollset_set");
  pollset_set->fds[pollset_set->fd_count++] = fd;
  for (i = 0; i < pollset_set->pollset_count; i++)
    {
      grpc_pollset_add_fd (exec_ctx, pollset_set->pollsets[i], fd);
    }
  gpr_mu_unlock (&pollset_set->mu);
}

void
grpc_pollset_set_del_fd (grpc_exec_ctx * exec_ctx, grpc_pollset_set * pollset_set, grpc_fd * fd)
{
  size_t i;
  gpr_mu_lock (&pollset_set->mu);
  for (i = 0; i < pollset_set->fd_count; i++)
    {
      if (pollset_set->fds[i] == fd)
	{
	  pollset_set->fd_count--;
	  GPR_SWAP (grpc_fd *, pollset_set->fds[i], pollset_set->fds[pollset_set->fd_count]);
	  GRPC_FD_UNREF (fd, "pollset_set");
	  break;
	}
    }
  gpr_mu_unlock (&pollset_set->mu);
}

#endif /* GPR_POSIX_SOCKET */