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unsafe_convert

unsafe_convert(T,x)

Convert x to a value of type T

In cases where convert would need to take a Julia object and turn it into a Ptr, this function should be used to define and perform that conversion.

Be careful to ensure that a julia reference to x exists as long as the result of this function will be used. Accordingly, the argument x to this function should never be an expression, only a variable name or field reference. For example, x=a.b.c is acceptable, but x=[a,b,c] is not.

The unsafe prefix on this function indicates that using the result of this function after the x argument to this function is no longer accessible to the program may cause undefined behavior, including program corruption or segfaults, at any later time.

Examples

unsafe_convert(T, x)

Convert x to a value of type T.

In cases where convert would need to take a Julia object and turn it into a Ptr, this function should be used to define and perform that conversion.

Be careful to ensure that a Julia reference to x exists as long as the result of this function will be used. Accordingly, the argument x to this function should never be an expression, only a variable name or field reference. For example, x = a.b.c is acceptable, but x = [a, b, c] is not.

The unsafe prefix on this function indicates that using the result of this function after the x argument to this function is no longer accessible to the program may cause undefined behavior, including program corruption or segfaults, at any later time.

Example usage:

julia> ptr = unsafe_convert(Ptr{Int}, 123)
Ptr{Int64} @0x0000000123456789

julia> unsafe_load(ptr)
123

In this example, unsafe_convert is used to convert the integer 123 to a pointer of type Ptr{Int}. The resulting pointer ptr can then be used with unsafe_load to retrieve the value.

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