Alexander Schmolck wrote:
AlFire <[EMAIL PROTECTED]> writes:
The threading module already has a function to return the number of Thread
objects currently alive.
I have threads within threads - so it does not suit me :-(.
How about using a scalar numpy array? They are mutable, so I assume that x +=
1 should be atomic.
No NO NO! The only way to increment a variable in memory is through a
three step process:
Load a register from a memory location
Increment the register
Store the value back into memory.
Ages ago, there were architectures that would do an increment on a
memory location in an atomic way, but with the current (RISC)
architectures these are three separate operations.
A good compiler may be able to eliminate some of these operations by
keeping the variable in question in a register, but this just worsens
the problem with respect to threads since each thread has it's own set
of register values.
Gary Herron
'as
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