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f79026b491
Cleaned up the structure of the whole OS-abstraction layer. fileops.c now contains a set of utility methods for file management used by the library. These are abstractions on top of the original POSIX calls. There's a new file called `posix.c` that contains emulations/reimplementations of all the POSIX calls the library uses. These are prefixed with `p_`. There's a specific posix file for each platform (win32 and unix). All the path-related methods have been moved from `utils.c` to `path.c` and have their own prefix.
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
#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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