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bb742ede3d
1. The license header is technically not valid if it doesn't have a copyright signature. 2. The COPYING file has been updated with the different licenses used in the project. 3. The full GPLv2 header in each file annoys me.
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
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* Copyright (C) 2009-2011 the libgit2 contributors
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#include <git2/common.h>
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#ifndef GIT_WIN32
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#include "map.h"
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#include <sys/mman.h>
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#include <errno.h>
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int p_mmap(git_map *out, size_t len, int prot, int flags, int fd, git_off_t offset)
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{
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int mprot = 0;
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int mflag = 0;
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assert((out != NULL) && (len > 0));
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if ((out == NULL) || (len == 0)) {
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errno = EINVAL;
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return git__throw(GIT_ERROR, "Failed to mmap. No map or zero length");
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}
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out->data = NULL;
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out->len = 0;
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if (prot & GIT_PROT_WRITE)
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mprot = PROT_WRITE;
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else if (prot & GIT_PROT_READ)
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mprot = PROT_READ;
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else {
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errno = EINVAL;
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return git__throw(GIT_ERROR, "Failed to mmap. Invalid protection parameters");
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}
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if ((flags & GIT_MAP_TYPE) == GIT_MAP_SHARED)
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mflag = MAP_SHARED;
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else if ((flags & GIT_MAP_TYPE) == GIT_MAP_PRIVATE)
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mflag = MAP_PRIVATE;
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if (flags & GIT_MAP_FIXED) {
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errno = EINVAL;
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return git__throw(GIT_ERROR, "Failed to mmap. FIXED not set");
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}
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out->data = mmap(NULL, len, mprot, mflag, fd, offset);
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if (!out->data || out->data == MAP_FAILED)
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return git__throw(GIT_EOSERR, "Failed to mmap. Could not write data");
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out->len = len;
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return GIT_SUCCESS;
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}
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int p_munmap(git_map *map)
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{
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assert(map != NULL);
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if (!map)
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return git__throw(GIT_ERROR, "Failed to munmap. Map does not exist");
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munmap(map->data, map->len);
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return GIT_SUCCESS;
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}
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#endif
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