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How to get address space size that a process is allowed to use

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# 1  
Old 05-05-2010
How to get address space size that a process is allowed to use
Hi All,

From C++, I just want to find the address space size that a process is allowed to use. For ex, in 32 bit OS the allowed address space is 4GB and in 64 bit OS I guess this is 16GB or more.

I jsut want to find it in my C++ project. Is there any API calls that gives me such information.

Thanks,
Sendil
# 2  
Old 05-05-2010
man getrlimit
# 3  
Old 05-05-2010
Quote:
Originally Posted by Sendil Kumar
Hi All,

From C++, I just want to find the address space size that a process is allowed to use. For ex, in 32 bit OS the allowed address space is 4GB and in 64 bit OS I guess this is 16GB or more.
To expand on achenle's suggestion, 4GB in a 32-bit system is the physical limit. There are 4GB possible different addresses a process can possibly have in its' address space in a 32-bit address space. Doesn't mean the OS will actually let it have that much.
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