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dc81cf377c
The last big hurdle towards a thread-safe API for the attribute system is the reliance on a global attribute stack that is modified during each call into the attribute system. This patch removes this global stack and instead a stack is stored locally in each attr_check instance. This opens up the opportunity for future optimizations to customize the attribute stack for the attributes that a particular attr_check struct is interested in. One caveat with pushing the attribute stack into the attr_check structure is that the attribute system now needs to keep track of all active attr_check instances. Due to the direction mechanism the stack needs to be dropped when the direction is switched. In order to ensure correctness when the direction is changed the attribute system needs to iterate through all active attr_check instances and drop each of their stacks. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
#ifndef ATTR_H
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#define ATTR_H
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/* An attribute is a pointer to this opaque structure */
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struct git_attr;
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/* opaque structures used internally for attribute collection */
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struct all_attrs_item;
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struct attr_stack;
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/*
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* Given a string, return the gitattribute object that
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* corresponds to it.
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*/
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const struct git_attr *git_attr(const char *);
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/* Internal use */
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extern const char git_attr__true[];
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extern const char git_attr__false[];
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/* For public to check git_attr_check results */
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#define ATTR_TRUE(v) ((v) == git_attr__true)
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#define ATTR_FALSE(v) ((v) == git_attr__false)
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#define ATTR_UNSET(v) ((v) == NULL)
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/*
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* Send one or more git_attr_check to git_check_attrs(), and
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* each 'value' member tells what its value is.
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* Unset one is returned as NULL.
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*/
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struct attr_check_item {
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const struct git_attr *attr;
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const char *value;
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};
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struct attr_check {
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int nr;
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int alloc;
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struct attr_check_item *items;
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int all_attrs_nr;
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struct all_attrs_item *all_attrs;
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struct attr_stack *stack;
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};
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extern struct attr_check *attr_check_alloc(void);
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extern struct attr_check *attr_check_initl(const char *, ...);
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extern struct attr_check_item *attr_check_append(struct attr_check *check,
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const struct git_attr *attr);
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extern void attr_check_reset(struct attr_check *check);
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extern void attr_check_clear(struct attr_check *check);
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extern void attr_check_free(struct attr_check *check);
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/*
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* Return the name of the attribute represented by the argument. The
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* return value is a pointer to a null-delimited string that is part
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* of the internal data structure; it should not be modified or freed.
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*/
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extern const char *git_attr_name(const struct git_attr *);
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extern int git_check_attr(const char *path, struct attr_check *check);
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/*
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* Retrieve all attributes that apply to the specified path.
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* check holds the attributes and their values.
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*/
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extern void git_all_attrs(const char *path, struct attr_check *check);
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enum git_attr_direction {
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GIT_ATTR_CHECKIN,
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GIT_ATTR_CHECKOUT,
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GIT_ATTR_INDEX
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};
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void git_attr_set_direction(enum git_attr_direction, struct index_state *);
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extern void attr_start(void);
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#endif /* ATTR_H */
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