NAME

EvmEventRead, EvmEventWrite − Performs I/O of events to and from a file

SYNOPSIS

#include <evm/evm.h>
EvmStatus_t EvmEventRead(
        EvmFd_t fd,
        EvmEvent_t ∗event ); EvmStatus_t EvmEventWrite(
        EvmFd_t fd,
        const EvmEvent_t event );

OPERANDS

event
For EvmEventRead(), the return operand created for the event read. For EvmEventWrite(), the event to be written. 

fdThe file descriptor to which the event should be written, or from which it should be read. 

DESCRIPTION

The EvmEventRead() routine creates a new event structure and populates it with an event read from the supplied file descriptor (fd). The EvmEventDestroy() routine must be used to destroy the new event when it is no longer needed. 

The EvmEventWrite() routine writes the supplied event to the specified file descriptor (fd).  It does not destroy the event. If the event is no longer needed, the caller should call EvmEventDestroy(). 

RESTRICTIONS

None

RETURN VALUES

EvmERROR_NONE
The operation was completed without error.

EvmERROR_EOF
En end-of-file condition was encountered while reading.

EvmERROR_INVALID_ARGUMENT
One of the arguments to the function was invalid.

EvmERROR_NO_MEMORY
An operation failed because an attempt to acquire heap memory failed.

EvmERROR_READ
An error occurred while reading an event. 

EvmERROR_WRITE
An error occurred while writing an event. 

ERRORS

None

LIBRARY

EVM Support Library (libevm.so, libevm.a)

FILES

None

SEE ALSO

Routines: EvmEventDestroy(3)

Files: kevm(7)

Event Management: EVM(5)

EVM Events: EvmEvent(5)