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Thanks to filmor's help, fix some problems where locking was going
wrong; in 2 cases we failed to unlock, and in 2 cases we tried to
free (which relocks) while already locked.
All simple fixes.
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When we moved over to a context based system, we laid the foundation
for a thread-safe mupdf. This commit should complete that process.
Firstly, fz_clone_context is properly implemented so that it
makes a new context, but shares certain sections (currently
just the allocator, and the store).
Secondly, we add locking (to parts of the code that have
previously just had placeholder LOCK/UNLOCK comments). Functions
to lock and unlock a mutex are added to the allocator structure;
omit these (as is the case today) and no multithreading is
(safely) possible. The context will refuse to clone if these are
not provided.
Finally we flesh out the LOCK/UNLOCK comments to be real calls of
the functions - unfortunately this requires us to plumb fz_context
into the fz_keep_storable function (and all the fz_keep_xxx
functions that call it). This is the largest section of the patch.
No changes expected to any test files.
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Add missing newline and remove excessive arguments.
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When fz_malloc (etc) are about to fail, we try to scavenge memory
from the store and then retry. We repeatedly try to bin objects
from the store until the malloc succeeds, or until we have nothing
else to bin.
This means we no longer need the 'aging' of the store, so this is
removed.
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Also: use 'cannot' instead of 'failed to' in error messages.
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This was removed during a previous commit to make the editing easier.
Now added back in.
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This frees us from passing errors back everywhere, and hence enables us
to pass results back as return values.
Rather than having to explicitly check for errors everywhere and bubble
them, we now allow exception handling to do the work for us; the
downside to this is that we no longer emit as much debugging information
as we did before (though this could be put back in). For now, the
debugging information we have lost has been retained in comments
with 'RJW:' at the start.
This code needs fuller testing, but is being committed as a work in
progress.
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Huge pervasive change to lots of files, adding a context for exception
handling and allocation.
In time we'll move more statics into there.
Also fix some for(i = 0; i < function(...); i++) calls.
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The run-together words are dead! Long live the underscores!
The postscript inspired naming convention of using all run-together
words has served us well, but it is now time for more readable code.
In this commit I have also added the sed script, rename.sed, that I used
to convert the source. Use it on your patches and application code.
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and change the signature of fz_realloc to match.
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get rid of large chunks of untested error handling code. This patch cleans up the handling of fz_obj.
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Prior to this patch, if the strdup failed, it would throw an error
printing the number of bytes that could not be allocated. However,
this was formatted as an int, while the actual argument passed is
the return value of strdup itself, which is usually a size_t.
This patch formats instead as an unsigned long, and adds a cast to
ensure the types match even on platforms where this isn't already
the case.
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the errors immediately.
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