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Øyvind Kolås authored
gegl_buffer_set, this allows transparent use of the buffers for writes since only one write will happen at a time. (At the moment the lock is implemented in the files header, and a GeglBuffer might get stuck in a locked state on disk if gegl is aborted when it holds the lock.) * gegl/buffer/gegl-buffer-access.c: (gegl_buffer_set): lock buffer on write if the buffer is shared. * gegl/buffer/gegl-buffer-index.h: fixed flags for header. * gegl/buffer/gegl-buffer-private.h: * gegl/buffer/gegl-buffer.c: (gegl_buffer_is_shared): new function reports if the buffer is shared (gegl_buffer_try_lock): tries to lock a shared buffer, if failed try again a bit later. (gegl_buffer_unlock): unlock a locked buffer, allows other clients to use the buffer. * gegl/buffer/gegl-tile-backend-file.[ch]: added _try_lock() _unlock() * gegl/buffer/gegl-tile-backend.[ch]: added shared flag to backend. svn path=/trunk/; revision=2258
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