54434 - Expunge _compare_and_swap_lock from jslock.c

Status: VERIFIED FIXED

(Core :: JavaScript Engine, defect, P3)

Description

[Brendan Eich [:brendan]]

There should be no global lock used to emulate compare-and-swap instructions.  
If the target architecture has no such atomic instruction, then jslock.c should 
be compiled with JS_USE_ONLY_NSPR_LOCKS (if NSPR hasn't been ported to the 
target arch, port it).  If compiled without JS_USE_ONLY_NSPR_LOCKS, jslock.c 
should have a big ugly #error "Target architecture doesn't support compare and 
swap.  Define JS_USE_ONLY_NSPR_LOCKS." or some such.

/be

Comment 1

[Patrick C. Beard]

Let's see a patch!

Comment 2

[Brendan Eich [:brendan]]

I did this while fixing bug 54743, the big "lock-free operation within a request
for single-threaded scopes" patch.

/be

Comment 3

[Phil Schwartau]

Marking Verified -