songvec: add songvec_for_each iterator
This is so we can more consistently deal with locking needed for thread-safety in iterator functions.
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@ -66,3 +66,16 @@ void songvec_destroy(struct songvec *sv)
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}
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sv->nr = 0;
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}
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int songvec_for_each(struct songvec *sv, int (*fn)(Song *, void *), void *arg)
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{
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int i;
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Song **sp = sv->base;
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for (i = sv->nr; --i >= 0; ) {
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if (fn(*sp++, arg) < 0)
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return -1;
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}
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return 0;
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}
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@ -19,4 +19,6 @@ void songvec_add(struct songvec *sv, Song *add);
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void songvec_destroy(struct songvec *sv);
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int songvec_for_each(struct songvec *sv, int (*fn)(Song *, void *), void *arg);
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#endif /* SONGVEC_H */
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