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cfa563a4a4
This adds some minor functionality to the per_task API for use by the upcoming offline waiting work. Add scoutfs_per_task_add_excl() so that a caller can tell if their task was already put on a per-task list by their caller. Make scoutfs_per_task_del() return a bool to indicate if the entry was found on a list and was in fact deleted, or not. Add scoutfs_per_task_init_entry() for initializing entries that aren't declared on the stack. Signed-off-by: Zach Brown <zab@versity.com>
32 lines
889 B
C
32 lines
889 B
C
#ifndef _SCOUTFS_PER_TASK_H_
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#define _SCOUTFS_PER_TASK_H_
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struct scoutfs_per_task {
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spinlock_t lock;
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struct list_head list;
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};
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struct scoutfs_per_task_entry {
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struct list_head head;
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struct task_struct *task;
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void *ptr;
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};
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#define SCOUTFS_DECLARE_PER_TASK_ENTRY(name) \
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struct scoutfs_per_task_entry name = { \
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.head = LIST_HEAD_INIT((name).head), \
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}
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void *scoutfs_per_task_get(struct scoutfs_per_task *pt);
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void scoutfs_per_task_add(struct scoutfs_per_task *pt,
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struct scoutfs_per_task_entry *ent, void *ptr);
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bool scoutfs_per_task_add_excl(struct scoutfs_per_task *pt,
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struct scoutfs_per_task_entry *ent, void *ptr);
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bool scoutfs_per_task_del(struct scoutfs_per_task *pt,
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struct scoutfs_per_task_entry *ent);
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void scoutfs_per_task_init(struct scoutfs_per_task *pt);
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void scoutfs_per_task_init_entry(struct scoutfs_per_task_entry *ent);
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#endif
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