Tizen Native API  4.0
Functions | Typedefs
Pipe wrapper
Ecore main loop

These functions wrap the pipe / write / read functions to easily integrate its use into ecore's main loop.

The ecore_pipe_add() function creates file descriptors (sockets on Windows) and attach a handle to the ecore main loop. That handle is called when data is read in the pipe. To write data in the pipe, just call ecore_pipe_write(). When you are done, just call ecore_pipe_del().

For examples see here:

Functions

Ecore_Pipe * ecore_pipe_add (Ecore_Pipe_Cb handler, const void *data)
Ecore_Pipe * ecore_pipe_full_add (Ecore_Pipe_Cb handler, const void *data, int fd_read, int fd_write, Eina_Bool read_survive_fork, Eina_Bool write_survive_fork)
void * ecore_pipe_del (Ecore_Pipe *p)
Eina_Bool ecore_pipe_write (Ecore_Pipe *p, const void *buffer, unsigned int nbytes)
void ecore_pipe_write_close (Ecore_Pipe *p)
void ecore_pipe_read_close (Ecore_Pipe *p)
int ecore_pipe_read_fd (Ecore_Pipe *p)
int ecore_pipe_write_fd (Ecore_Pipe *p)
void ecore_pipe_thaw (Ecore_Pipe *p)
void ecore_pipe_freeze (Ecore_Pipe *p)
int ecore_pipe_wait (Ecore_Pipe *p, int message_count, double wait)
 Waits from another thread on the read side of a pipe.

Typedefs

typedef struct _Ecore_Pipe Ecore_Pipe
typedef void(* Ecore_Pipe_Cb )(void *data, void *buffer, unsigned int nbyte)

Typedef Documentation

typedef struct _Ecore_Pipe Ecore_Pipe

A handle for pipes

Ecore_Pipe_Cb Ecore_Pipe_Cb

The callback that data written to the pipe is sent to.

Function Documentation

Ecore_Pipe* ecore_pipe_add ( Ecore_Pipe_Cb  handler,
const void *  data 
)

Creates two file descriptors (sockets on Windows). Adds a callback that will be called when the file descriptor that is listened receives data. An event is also put in the event queue when data is received.

Parameters:
handlerThe handler called when data is received.
dataData to pass to handler when it is called.
Returns:
A newly created Ecore_Pipe object if successful, NULL otherwise.
Since :
2.3.1
Examples:
ecore_pipe_gstreamer_example.c, and ecore_pipe_simple_example.c.
void* ecore_pipe_del ( Ecore_Pipe *  p)

Frees an Ecore_Pipe object created with ecore_pipe_add().

Parameters:
pThe Ecore_Pipe object to be freed.
Returns:
The pointer to the private data
Since :
2.3.1
Examples:
ecore_pipe_gstreamer_example.c, and ecore_pipe_simple_example.c.
void ecore_pipe_freeze ( Ecore_Pipe *  p)

Stops monitoring if necessary the pipe for reading. See ecore_pipe_thaw() for monitoring it again.

Parameters:
pThe Ecore_Pipe object.
Since (EFL) :
1.1
Since :
2.3.1
Ecore_Pipe* ecore_pipe_full_add ( Ecore_Pipe_Cb  handler,
const void *  data,
int  fd_read,
int  fd_write,
Eina_Bool  read_survive_fork,
Eina_Bool  write_survive_fork 
)

Creates a pipe with more parameters.

Parameters:
handlerSame as ecore_pipe_add()
dataSame as ecore_pipe_add()
fd_readAn fd to use for reading or -1 otherwise
fd_writeAn fd to use for writing or -1 otherwise
read_survive_forkShould read fd survive a fork
write_survive_forkShould write fd survive a fork

This is the same as ecore_pipe_add() but with some added parameters.

Returns:
A pointer to the new Ecore_Pipe object on success, else NULL.
See also:
ecore_pipe_add()
Since :
3.0
void ecore_pipe_read_close ( Ecore_Pipe *  p)

Closes the read end of an Ecore_Pipe object created with ecore_pipe_add().

Parameters:
pThe Ecore_Pipe object.
Since :
2.3.1
Examples:
ecore_pipe_simple_example.c.
int ecore_pipe_read_fd ( Ecore_Pipe *  p)

Gets the pipe read file descriptor.

Parameters:
pThe Ecore_Pipe object query.
Returns:
The file descriptor, or -1 if none
Since :
3.0
void ecore_pipe_thaw ( Ecore_Pipe *  p)

Starts monitoring again the pipe for reading. See ecore_pipe_freeze() for stopping the monitoring activity. This will not work if ecore_pipe_read_close() was previously called on the same pipe.

Parameters:
pThe Ecore_Pipe object.
Since (EFL) :
1.1
Since :
2.3.1
int ecore_pipe_wait ( Ecore_Pipe *  p,
int  message_count,
double  wait 
)

Waits from another thread on the read side of a pipe.

Parameters:
pThe pipe to watch on.
message_countThe minimal number of message to wait before exiting.
waitThe amount of time in second to wait before exiting.
Returns:
the number of message catched during that wait call.
Since (EFL) :
1.1

Negative value for wait means infite wait.

Since :
2.3.1
Eina_Bool ecore_pipe_write ( Ecore_Pipe *  p,
const void *  buffer,
unsigned int  nbytes 
)

Writes on the file descriptor the data passed as parameter.

Parameters:
pThe Ecore_Pipe object.
bufferThe data to write into the pipe.
nbytesThe size of the buffer in bytes.
Returns:
EINA_TRUE on a successful write, EINA_FALSE on error.
Since :
2.3.1
Examples:
ecore_pipe_gstreamer_example.c, and ecore_pipe_simple_example.c.
void ecore_pipe_write_close ( Ecore_Pipe *  p)

Closes the write end of an Ecore_Pipe object created with ecore_pipe_add().

Parameters:
pThe Ecore_Pipe object.
Since :
2.3.1
Examples:
ecore_pipe_simple_example.c.
int ecore_pipe_write_fd ( Ecore_Pipe *  p)

Gets the pipe write file descriptor.

Parameters:
pThe Ecore_Pipe object query.
Returns:
The file descriptor, or -1 if none
Since :
3.0