include/ortp/sessionset.h File Reference

Sending and receiving multiple streams together with only one thread. More...

#include <ortp/rtpsession.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>

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Data Structures

struct  _SessionSet

Defines

#define ORTP_FD_SET(d, s)   FD_SET(d, s)
#define ORTP_FD_CLR(d, s)   FD_CLR(d, s)
#define ORTP_FD_ISSET(d, s)   FD_ISSET(d, s)
#define ORTP_FD_ZERO(s)   FD_ZERO(s)
#define session_set_init(ss)   ORTP_FD_ZERO(&(ss)->rtpset)
#define session_set_set(ss, rtpsession)   ORTP_FD_SET((rtpsession)->mask_pos,&(ss)->rtpset)
#define session_set_is_set(ss, rtpsession)   ORTP_FD_ISSET((rtpsession)->mask_pos,&(ss)->rtpset)
#define session_set_clr(ss, rtpsession)   ORTP_FD_CLR((rtpsession)->mask_pos,&(ss)->rtpset)
#define session_set_copy(dest, src)   memcpy(&(dest)->rtpset,&(src)->rtpset,sizeof(ortp_fd_set))

Typedefs

typedef fd_set ortp_fd_set
typedef struct _SessionSet SessionSet

Functions

SessionSet * session_set_new (void)
void session_set_destroy (SessionSet *set)
int session_set_select (SessionSet *recvs, SessionSet *sends, SessionSet *errors)


Detailed Description

Sending and receiving multiple streams together with only one thread.


Define Documentation

#define session_set_clr ( ss,
rtpsession   )     ORTP_FD_CLR((rtpsession)->mask_pos,&(ss)->rtpset)

Removes the session from the set.

Parameters:
ss a set of sessions.
rtpsession a rtp session.

#define session_set_is_set ( ss,
rtpsession   )     ORTP_FD_ISSET((rtpsession)->mask_pos,&(ss)->rtpset)

This macro tests if the session is part of the set. 1 is returned if true, 0 else.

Parameters:
ss a set (SessionSet object)
rtpsession a rtp session

#define session_set_set ( ss,
rtpsession   )     ORTP_FD_SET((rtpsession)->mask_pos,&(ss)->rtpset)

This macro adds the rtp session to the set.

Parameters:
ss a set (SessionSet object)
rtpsession a RtpSession


Function Documentation

void session_set_destroy ( SessionSet *  set  ) 

Frees a SessionSet.

Destroys a session set.

SessionSet* session_set_new ( void   ) 

Allocates and initialize a new empty session set.

Returns:
the empty session set.

int session_set_select ( SessionSet *  recvs,
SessionSet *  sends,
SessionSet *  errors 
)

This function performs similarly as libc select() function, but performs on RtpSession instead of file descriptors. session_set_select() suspends the calling process until some events arrive on one of the three sets passed in argument. Two of the sets can be NULL. The first set is interpreted as a set of RtpSession waiting for receive events: a new buffer (perhaps empty) is availlable on one or more sessions of the set, or the last receive operation with rtp_session_recv_with_ts() would have finished if it were in blocking mode. The second set is interpreted as a set of RtpSession waiting for send events, i.e. the last rtp_session_send_with_ts() call on a session would have finished if it were in blocking mode.

When some events arrived on some of sets, then the function returns and sets are changed to indicate the sessions where events happened. Sessions can be added to sets using session_set_set(), a session has to be tested to be part of a set using session_set_is_set().

Parameters:
recvs a set of rtp sessions to be watched for read events
sends a set of rtp sessions to be watched for write events
errors a set of rtp sessions to be watched for errors
Returns:
: the number of sessions on which the selected events happened.


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