| /* | |
| * XMS driver for DOSMid | |
| * | |
| * Copyright (C) 2014-2018 Mateusz Viste | |
| * All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * | |
| * 1. Redistributions of source code must retain the above copyright notice, | |
| * this list of conditions and the following disclaimer. | |
| * | |
| * 2. Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| * POSSIBILITY OF SUCH DAMAGE. | |
| */ | |
| #ifndef xms_h_sentinel | |
| #define xms_h_sentinel | |
| struct xms { | |
| unsigned short int handle; | |
| long int memsize; /* allocated memory size, in bytes */ | |
| }; | |
| /* checks if a XMS driver is installed, inits it and allocates a memory block of memsize K-bytes. | |
| * if memsize is 0, then the maximum possible block will be allocated. | |
| * returns the amount of allocated memory (in K-bytes) on success, 0 otherwise. */ | |
| unsigned int xms_init(struct xms *xms, unsigned short int memsize); | |
| /* free XMS memory */ | |
| void xms_close(struct xms *xms); | |
| /* copies a chunk of memory from conventional memory into the XMS block. | |
| returns 0 on sucess, non-zero otherwise. */ | |
| int xms_push(struct xms *xms, void far *src, unsigned short int len, long int xmsoffset); | |
| /* copies a chunk of memory from the XMS block into conventional memory */ | |
| int xms_pull(struct xms *xms, long int xmsoffset, void far *dst, unsigned short int len); | |
| #endif |