65 lines
3.4 KiB
C
65 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/macros.h"
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#include "libc/nt/memory.h"
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#include "libc/nt/runtime.h"
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#include "libc/runtime/directmap.h"
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static textwindows struct DirectMap DirectMapNt(void *addr, size_t size,
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unsigned prot, unsigned flags,
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int fd, int64_t off) {
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int64_t handle;
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struct DirectMap res;
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uint32_t protect, access;
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if (fd != -1) {
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handle = g_fds.p[fd].handle;
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} else {
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handle = kNtInvalidHandleValue;
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}
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protect = prot2nt(prot, flags);
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access = fprot2nt(prot, flags);
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if ((res.maphandle =
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CreateFileMappingNuma(handle, NULL, protect, size >> 32, size, NULL,
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kNtNumaNoPreferredNode))) {
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if (!(res.addr = MapViewOfFileExNuma(res.maphandle, access, off >> 32, off,
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size, addr, kNtNumaNoPreferredNode))) {
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CloseHandle(res.maphandle);
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res.maphandle = kNtInvalidHandleValue;
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res.addr = (void *)(intptr_t)winerr();
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}
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} else {
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res.maphandle = kNtInvalidHandleValue;
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res.addr = (void *)(intptr_t)winerr();
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}
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return res;
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}
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struct DirectMap DirectMap(void *addr, size_t size, unsigned prot,
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unsigned flags, int fd, int64_t off) {
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if (!IsWindows()) {
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return (struct DirectMap){mmap$sysv(addr, size, prot, flags, fd, off),
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kNtInvalidHandleValue};
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} else {
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return DirectMapNt(addr, size, prot, flags, fd, off);
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}
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}
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