Andrew Burgess
241f29fba6
Within bfd/cache.c change the type for max_open_files and open_files variables from int to unsigned. As a consequence of this, the return type for bfd_cache_max_open() is also changed from int to unsigned. Within bfd_cache_max_open I've left the local 'max' variable as an int, this should ensure that if the sysconf call fails, and returns -1, then the computed max value will be less than 10, which means max_open_files will be set to 10. If 'max' was changed to unsigned then, should the sysconf call fail, we'd end up with max becoming a very large positive number ... which is clearly not what we want. And, while I was auditing how open_files is used, I added an assert within bfd_cache_delete to ensure that we don't try to reduce open_files below zero. There should be no user visible change with this commit.
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