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32 lines
670 B
32 lines
670 B
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <panic.h>
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#include <map.h>
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namespace {
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constexpr inline auto MEMFD_DEFAULT_FLAGS = MFD_CLOEXEC;
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int memfd_alloc(const char* name, size_t size = 0, int flags = MEMFD_DEFAULT_FLAGS)
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{
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int fd = memfd_create(name, flags);
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if(fd < 0) panic("memfd_create() failed");
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if(size)
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if(ftruncate(fd, size)) { close(fd); panic("ftruncate() failed"); }
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return fd;
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}
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}
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namespace mm {
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vmap::vmap()
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: mmap(create_raw_fd(memfd_alloc(__PRETTY_FUNCTION__))) {}
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vmap::vmap(size_t sz)
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: mmap(create_raw_fd(memfd_alloc(__PRETTY_FUNCTION__, sz))) {}
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}
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