[TriLUG] shared libraries aren't shared
Joseph Mack NA3T
jmack at wm7d.net
Wed Nov 11 16:36:56 EST 2009
On Wed, 11 Nov 2009, Alan Porter wrote:
> That is not how shared libraries work (thank goodness).
did they used to work this way?
So shared globals in libraries is process safe, but not
> But there are two copies of the data segment, one for each
so there's two BSS's. Didn't know that.
if instead of having a global variable in the library code,
static int j;
printf ("j=%d \n", j);
I still don't get a race condition when used by two
executables. Is the static int j stored in its own data
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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