Blame src/pty/ntapi_pty_io.c

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/********************************************************/
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/*  ntapi: Native API core library                      */
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/*  Copyright (C) 2013--2016  Z. Gilboa                 */
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/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
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/********************************************************/
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#include <psxtypes/psxtypes.h>
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#include <ntapi/nt_port.h>
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#include <ntapi/nt_tty.h>
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#include <ntapi/ntapi.h>
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#include "ntapi_impl.h"
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#include "ntapi_pty.h"
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static int32_t __stdcall __ntapi_pty_read_write(
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	nt_pty *		pty,
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	void *			hevent,
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	nt_io_apc_routine *	apc_routine,
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	void *			apc_context,
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	nt_iosb *		iosb,
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	void *			buffer,
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	size_t			nbytes,
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	nt_large_integer *	offset,
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	uint32_t *		key,
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	int32_t			opcode)
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{
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	int32_t		status;
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	nt_pty_io_msg	msg;
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	off_t		soffset;
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	int		mode;
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	mode = opcode - NT_TTY_PTY_READ;
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	soffset = mode * pty->section_size / 2;
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	if (offset && offset->quad)
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		return NT_STATUS_INVALID_PARAMETER;
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	else if (__ntapi->tt_sync_block_lock(&pty->sync[mode],1,0,0))
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		return NT_STATUS_RESOURCE_NOT_OWNED;
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	nbytes = nbytes <= pty->section_size / 2
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		? nbytes
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		: pty->section_size / 2;
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	__ntapi->tt_aligned_block_memset(
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		&msg,0,sizeof(msg));
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	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
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	msg.header.data_size		= sizeof(msg.data);
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	msg.header.msg_size		= sizeof(msg);
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	msg.data.ttyinfo.opcode		= opcode;
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	msg.data.ioinfo.hpty		= pty->hpty;
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	msg.data.ioinfo.hevent		= hevent;
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	msg.data.ioinfo.apc_routine	= apc_routine;
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	msg.data.ioinfo.apc_context	= apc_context;
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	msg.data.ioinfo.key		= key ? *key : 0;
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	msg.data.ioinfo.luid.high	= pty->luid.high;
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	msg.data.ioinfo.luid.low	= pty->luid.low;
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	msg.data.ioinfo.riosb		= iosb;
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	msg.data.ioinfo.raddr		= buffer;
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	__ntapi->tt_guid_copy(
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		&msg.data.ioinfo.guid,
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		&pty->guid);
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	msg.data.ioinfo.nbytes		= nbytes;
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	msg.data.ioinfo.offset		= soffset;
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	if (mode == __PTY_WRITE)
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		__ntapi->tt_generic_memcpy(
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			(char *)pty->section_addr + soffset,
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			(char *)buffer,
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			nbytes);
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	if ((status = __ntapi->zw_request_wait_reply_port(pty->hport,&msg,&msg)))
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		return status;
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	else if (msg.data.ttyinfo.status)
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		return msg.data.ttyinfo.status;
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	if (mode == __PTY_READ)
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		__ntapi->tt_generic_memcpy(
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			(char *)buffer,
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			(char *)pty->section_addr + soffset,
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			msg.data.ioinfo.iosb.info);
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	iosb->info   = msg.data.ioinfo.iosb.info;
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	iosb->status = msg.data.ioinfo.iosb.status;
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	return NT_STATUS_SUCCESS;
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}
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int32_t	__stdcall __ntapi_pty_read(
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	__in	nt_pty *		pty,
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	__in	void *			hevent		__optional,
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	__in	nt_io_apc_routine *	apc_routine	__optional,
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	__in	void *			apc_context	__optional,
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	__out	nt_iosb *		iosb,
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	__out	void *			buffer,
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	__in	uint32_t		nbytes,
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	__in	nt_large_integer *	offset		__optional,
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	__in	uint32_t *		key		__optional)
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{
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	return __ntapi_pty_read_write(
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		pty,
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		hevent,apc_routine,apc_context,
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		iosb,buffer,nbytes,offset,key,
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		NT_TTY_PTY_READ);
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}
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int32_t __stdcall __ntapi_pty_write(
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	__in	nt_pty *		pty,
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	__in 	void *			hevent		__optional,
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	__in	nt_io_apc_routine *	apc_routine	__optional,
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	__in	void * 			apc_context	__optional,
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	__out	nt_iosb *		iosb,
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	__in	void * 			buffer,
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	__in	uint32_t		nbytes,
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	__in	nt_large_integer *	offset		__optional,
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	__in	uint32_t *		key		__optional)
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{
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	return __ntapi_pty_read_write(
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		pty,
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		hevent,apc_routine,apc_context,
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		iosb,buffer,nbytes,offset,key,
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		NT_TTY_PTY_WRITE);
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}