53 lines
935 B
Rust
53 lines
935 B
Rust
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/*
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Module: ptr
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Unsafe pointer utility functions
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*/
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#[abi = "rust-intrinsic"]
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native mod rusti {
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fn addr_of<T>(val: T) -> *T;
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fn ptr_offset<T>(ptr: *T, count: uint) -> *T;
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}
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/*
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Function: addr_of
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Get an unsafe pointer to a value
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*/
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fn addr_of<T>(val: T) -> *T { ret rusti::addr_of(val); }
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/*
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Function: mut_addr_of
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Get an unsafe mutable pointer to a value
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*/
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fn mut_addr_of<T>(val: T) -> *mutable T unsafe {
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ret unsafe::reinterpret_cast(rusti::addr_of(val));
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}
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/*
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Function: offset
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Calculate the offset from a pointer
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*/
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fn offset<T>(ptr: *T, count: uint) -> *T {
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ret rusti::ptr_offset(ptr, count);
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}
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/*
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Function: mut_offset
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Calculate the offset from a mutable pointer
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*/
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fn mut_offset<T>(ptr: *mutable T, count: uint) -> *mutable T {
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ret rusti::ptr_offset(ptr as *T, count) as *mutable T;
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}
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/*
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Function: null
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Create an unsafe null pointer
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*/
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fn null<T>() -> *T unsafe { ret unsafe::reinterpret_cast(0u); }
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