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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <fcntl.h>
#include <sys/stat.h>
#include "Mappable.h"
Mappable* Mappable::Create(const char* path) {
int fd = open(path, O_RDONLY);
if (fd != -1) return new Mappable(fd);
return nullptr;
}
MemoryRange Mappable::mmap(const void* addr, size_t length, int prot, int flags,
off_t offset) {
MOZ_ASSERT(fd && *fd != -1);
MOZ_ASSERT(!(flags & MAP_SHARED));
flags |= MAP_PRIVATE;
return MemoryRange::mmap(const_cast<void*>(addr), length, prot, flags, *fd,
offset);
}
void Mappable::finalize() {
/* Close file ; equivalent to close(fd.forget()) */
fd.emplace(-1);
}
size_t Mappable::GetLength() const {
struct stat st;
return fstat(*fd, &st) ? 0 : st.st_size;
}
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