?? pice.c
字號:
/* Determine if there is an error with the pipe pointer. */
if (pipe == NU_NULL)
/* Indicate that the pipe pointer is invalid. */
status = NU_INVALID_PIPE;
else if (pipe -> pi_id != PI_PIPE_ID)
/* Indicate that the pipe pointer is invalid. */
status = NU_INVALID_PIPE;
else
/* All the parameters are okay, call the actual function to delete
a pipe. */
status = PIC_Delete_Pipe(pipe_ptr);
/* Return completion status. */
return(status);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* PICE_Send_To_Pipe */
/* */
/* DESCRIPTION */
/* */
/* This function performs error checking on the parameters supplied */
/* to the send message to pipe function. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* PIC_Send_To_Pipe Actual send pipe message */
/* function */
/* TCCE_Suspend_Error Check suspend validity */
/* */
/* INPUTS */
/* */
/* pipe_ptr Pipe control block pointer */
/* message Pointer to message to send */
/* size Size of message to send */
/* suspend Suspension option if full */
/* */
/* OUTPUTS */
/* */
/* NU_INVALID_PIPE Invalid pipe pointer */
/* NU_INVALID_POINTER Invalid message pointer */
/* NU_INVALID_SIZE Invalid message size */
/* NU_INVALID_SUSPEND Invalid suspend request */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 03-01-1994 Modified function interface, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* 06-04-1998 Corrected SPR493 */
/* */
/*************************************************************************/
STATUS PICE_Send_To_Pipe(NU_PIPE *pipe_ptr, VOID *message, UNSIGNED size,
UNSIGNED suspend)
{
PI_PCB *pipe;
STATUS status;
/* Move input pipe pointer into internal pointer. */
pipe = (PI_PCB *) pipe_ptr;
/* Determine if there is an error with the pipe pointer. */
if (pipe == NU_NULL)
/* Indicate that the pipe pointer is invalid. */
status = NU_INVALID_PIPE;
else if (pipe -> pi_id != PI_PIPE_ID)
/* Indicate that the pipe pointer is invalid. */
status = NU_INVALID_PIPE;
else if (message == NU_NULL)
/* Indicate that the pointer to the message is invalid. */
status = NU_INVALID_POINTER;
else if (size == 0)
/* Indicate that the message size is invalid. */
status = NU_INVALID_SIZE;
else if ((pipe -> pi_fixed_size) && (size != pipe -> pi_message_size))
/* Indicate that the message size is invalid. */
status = NU_INVALID_SIZE;
else if ((!pipe -> pi_fixed_size) && (size > pipe -> pi_message_size))
/* Indicate that the message size is invalid. */
status = NU_INVALID_SIZE;
else if ((suspend) && (TCCE_Suspend_Error()))
/* Indicate that suspension is only valid from a non-task thread. */
status = NU_INVALID_SUSPEND;
else
/* All the parameters are okay, call the actual function to send
a message to a pipe. */
status = PIC_Send_To_Pipe(pipe_ptr, message, size, suspend);
/* Return completion status. */
return(status);
}
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* PICE_Receive_From_Pipe */
/* */
/* DESCRIPTION */
/* */
/* This function performs error checking on the parameters supplied */
/* to the receive message from pipe function. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* CALLS */
/* */
/* PIC_Receive_From_Pipe Actual receive message from */
/* pipe */
/* TCCE_Suspend_Error Check suspend validity */
/* */
/* INPUTS */
/* */
/* pipe_ptr Pipe control block pointer */
/* message Pointer to message to send */
/* size Size of the message */
/* actual_size Size of message received */
/* suspend Suspension option if empty */
/* */
/* OUTPUTS */
/* */
/* NU_INVALID_PIPE Invalid pipe pointer */
/* NU_INVALID_POINTER Invalid message pointer */
/* NU_INVALID_SIZE Invalid message size */
/* NU_INVALID_SUSPEND Invalid suspend request */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 03-01-1994 Modified function interface, */
/* resulting in version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* 12-19-1995 Changed the variable pipe check */
/* from "message size not equal */
/* to pipe message size" to */
/* "message size greater than */
/* pipe message size",resulting */
/* in version 1.1+ (spr065) */
/* */
/*************************************************************************/
STATUS PICE_Receive_From_Pipe(NU_PIPE *pipe_ptr, VOID *message,
UNSIGNED size, UNSIGNED *actual_size, UNSIGNED suspend)
{
PI_PCB *pipe;
STATUS status;
/* Move input pipe pointer into internal pointer. */
pipe = (PI_PCB *) pipe_ptr;
/* Determine if there is an error with the pipe pointer. */
if (pipe == NU_NULL)
/* Indicate that the pipe pointer is invalid. */
status = NU_INVALID_PIPE;
else if (pipe -> pi_id != PI_PIPE_ID)
/* Indicate that the pipe pointer is invalid. */
status = NU_INVALID_PIPE;
else if (message == NU_NULL)
/* Indicate that the pointer to the message is invalid. */
status = NU_INVALID_POINTER;
else if (size == 0)
/* Indicate that the message size is invalid. */
status = NU_INVALID_SIZE;
else if ((pipe -> pi_fixed_size) && (size != pipe -> pi_message_size))
/* Indicate that the message size is invalid. */
status = NU_INVALID_SIZE;
else if ((!pipe -> pi_fixed_size) && (size > pipe -> pi_message_size))
/* Indicate that the message size is invalid. */
status = NU_INVALID_SIZE;
else if ((suspend) && (TCCE_Suspend_Error()))
/* Indicate that suspension is only valid from a non-task thread. */
status = NU_INVALID_SUSPEND;
else
/* All the parameters are okay, call the actual function to receive
a message from a pipe. */
status = PIC_Receive_From_Pipe(pipe_ptr, message, size, actual_size,
suspend);
/* Return completion status. */
return(status);
}
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