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- /* Copyright 2000-2004 The Apache Software Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- #ifndef APR_POLL_H
- #define APR_POLL_H
- /**
- * @file apr_poll.h
- * @brief APR Poll interface
- */
- #include "apr.h"
- #include "apr_pools.h"
- #include "apr_errno.h"
- #include "apr_inherit.h"
- #include "apr_file_io.h"
- #include "apr_network_io.h"
-
- #if APR_HAVE_NETINET_IN_H
- #include <netinet/in.h>
- #endif
-
- #ifdef __cplusplus
- extern "C" {
- #endif /* __cplusplus */
-
- /**
- * @defgroup apr_poll Poll Routines
- * @ingroup APR
- * @{
- */
-
- /**
- * @defgroup apr_poll_opt Poll options
- * @{
- */
- #define APR_POLLIN 0x001 /**< Can read without blocking */
- #define APR_POLLPRI 0x002 /**< Priority data available */
- #define APR_POLLOUT 0x004 /**< Can write without blocking */
- #define APR_POLLERR 0x010 /**< Pending error */
- #define APR_POLLHUP 0x020 /**< Hangup occurred */
- #define APR_POLLNVAL 0x040 /**< Descriptior invalid */
- /** @} */
-
- /** Used in apr_pollfd_t to determine what the apr_descriptor is */
- typedef enum {
- APR_NO_DESC, /**< nothing here */
- APR_POLL_SOCKET, /**< descriptor refers to a socket */
- APR_POLL_FILE, /**< descriptor refers to a file */
- APR_POLL_LASTDESC /**< descriptor is the last one in the list */
- } apr_datatype_e ;
-
- /** Union of either an APR file or socket. */
- typedef union {
- apr_file_t *f; /**< file */
- apr_socket_t *s; /**< socket */
- } apr_descriptor;
-
- /** @see apr_pollfd_t */
- typedef struct apr_pollfd_t apr_pollfd_t;
-
- /** Poll descriptor set. */
- struct apr_pollfd_t {
- apr_pool_t *p; /**< associated pool */
- apr_datatype_e desc_type; /**< descriptor type */
- apr_int16_t reqevents; /**< requested events */
- apr_int16_t rtnevents; /**< returned events */
- apr_descriptor desc; /**< @see apr_descriptor */
- void *client_data; /**< allows app to associate context */
- };
-
- /**
- * Setup the memory required for poll to operate properly
- * @param new_poll The poll structure to be used.
- * @param num The number of socket descriptors to be polled.
- * @param cont The pool to operate on.
- * @deprecated This function is deprecated, APR applications should control the pollset memory themselves.
- */
- APR_DECLARE(apr_status_t) apr_poll_setup(apr_pollfd_t **new_poll,
- apr_int32_t num,
- apr_pool_t *cont);
-
- /**
- * Poll the sockets in the poll structure
- * @param aprset The poll structure we will be using.
- * @param numsock The number of sockets we are polling
- * @param nsds The number of sockets signalled.
- * @param timeout The amount of time in microseconds to wait. This is
- * a maximum, not a minimum. If a socket is signalled, we
- * will wake up before this time. A negative number means
- * wait until a socket is signalled.
- * @remark
- * <PRE>
- * The number of sockets signalled is returned in the second argument.
- *
- * This is a blocking call, and it will not return until either a
- * socket has been signalled, or the timeout has expired.
- * </PRE>
- */
- APR_DECLARE(apr_status_t) apr_poll(apr_pollfd_t *aprset, apr_int32_t numsock,
- apr_int32_t *nsds,
- apr_interval_time_t timeout);
-
- /**
- * Add a socket to the poll structure.
- * @param aprset The poll structure we will be using.
- * @param sock The socket to add to the current poll structure.
- * @param event The events to look for when we do the poll. One of:
- * <PRE>
- * APR_POLLIN signal if read will not block
- * APR_POLLPRI signal if prioirty data is availble to be read
- * APR_POLLOUT signal if write will not block
- * </PRE>
- * @deprecated This function is deprecated, APR applications should control the pollset memory themselves.
- */
- APR_DECLARE(apr_status_t) apr_poll_socket_add(apr_pollfd_t *aprset,
- apr_socket_t *sock,
- apr_int16_t event);
-
- /**
- * Modify a socket in the poll structure with mask.
- * @param aprset The poll structure we will be using.
- * @param sock The socket to modify in poll structure.
- * @param events The events to stop looking for during the poll. One of:
- * <PRE>
- * APR_POLLIN signal if read will not block
- * APR_POLLPRI signal if priority data is available to be read
- * APR_POLLOUT signal if write will not block
- * </PRE>
- * @deprecated This function is deprecated, APR applications should control the pollset memory themselves.
- */
- APR_DECLARE(apr_status_t) apr_poll_socket_mask(apr_pollfd_t *aprset,
- apr_socket_t *sock,
- apr_int16_t events);
- /**
- * Remove a socket from the poll structure.
- * @param aprset The poll structure we will be using.
- * @param sock The socket to remove from the current poll structure.
- * @deprecated This function is deprecated, APR applications should control the pollset memory themselves.
- */
- APR_DECLARE(apr_status_t) apr_poll_socket_remove(apr_pollfd_t *aprset,
- apr_socket_t *sock);
-
- /**
- * Clear all events in the poll structure.
- * @param aprset The poll structure we will be using.
- * @param events The events to clear from all sockets. One of:
- * <PRE>
- * APR_POLLIN signal if read will not block
- * APR_POLLPRI signal if priority data is available to be read
- * APR_POLLOUT signal if write will not block
- * </PRE>
- * @deprecated This function is deprecated, APR applications should control the pollset memory themselves.
- */
- APR_DECLARE(apr_status_t) apr_poll_socket_clear(apr_pollfd_t *aprset,
- apr_int16_t events);
-
- /**
- * Get the return events for the specified socket.
- * @param event The returned events for the socket. One of:
- * <PRE>
- * APR_POLLIN Data is available to be read
- * APR_POLLPRI Priority data is availble to be read
- * APR_POLLOUT Write will succeed
- * APR_POLLERR An error occurred on the socket
- * APR_POLLHUP The connection has been terminated
- * APR_POLLNVAL This is an invalid socket to poll on.
- * Socket not open.
- * </PRE>
- * @param sock The socket we wish to get information about.
- * @param aprset The poll structure we will be using.
- * @deprecated This function is deprecated, APR applications should control the pollset memory themselves.
- */
- APR_DECLARE(apr_status_t) apr_poll_revents_get(apr_int16_t *event,
- apr_socket_t *sock,
- apr_pollfd_t *aprset);
-
- /* General-purpose poll API for arbitrarily large numbers of
- * file descriptors
- */
-
- /** Opaque structure used for pollset API */
- typedef struct apr_pollset_t apr_pollset_t;
-
- /**
- * Setup a pollset object
- * @param pollset The pointer in which to return the newly created object
- * @param size The maximum number of descriptors that this pollset can hold
- * @param p The pool from which to allocate the pollset
- * @param flags Optional flags to modify the operation of the pollset
- * (reserved for future expansion)
- */
- APR_DECLARE(apr_status_t) apr_pollset_create(apr_pollset_t **pollset,
- apr_uint32_t size,
- apr_pool_t *p,
- apr_uint32_t flags);
-
- /**
- * Destroy a pollset object
- * @param pollset The pollset to destroy
- */
- APR_DECLARE(apr_status_t) apr_pollset_destroy(apr_pollset_t *pollset);
-
- /**
- * Add a socket or file descriptor to a pollset
- * @param pollset The pollset to which to add the descriptor
- * @param descriptor The descriptor to add
- * @remark If you set client_data in the descriptor, that value
- * will be returned in the client_data field whenever this
- * descriptor is signalled in apr_pollset_poll().
- */
- APR_DECLARE(apr_status_t) apr_pollset_add(apr_pollset_t *pollset,
- const apr_pollfd_t *descriptor);
-
- /**
- * Remove a descriptor from a pollset
- * @param pollset The pollset from which to remove the descriptor
- * @param descriptor The descriptor to remove
- */
- APR_DECLARE(apr_status_t) apr_pollset_remove(apr_pollset_t *pollset,
- const apr_pollfd_t *descriptor);
-
- /**
- * Block for activity on the descriptor(s) in a pollset
- * @param pollset The pollset to use
- * @param timeout Timeout in microseconds
- * @param num Number of signalled descriptors (output parameter)
- * @param descriptors Array of signalled descriptors (output parameter)
- */
- APR_DECLARE(apr_status_t) apr_pollset_poll(apr_pollset_t *pollset,
- apr_interval_time_t timeout,
- apr_int32_t *num,
- const apr_pollfd_t **descriptors);
-
- /** @} */
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* ! APR_POLL_H */
-
-