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    (c)->pc = (sysarg_t) (_pc);             \
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    (c)->pc = (sysarg_t) (_pc);             \
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    (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA;     \
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    (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA;     \
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        (c)->tls = (sysarg_t) (ptls);
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        (c)->tls = (sysarg_t) (ptls);
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#endif /* context_set */
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#endif /* context_set */
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typedef enum {
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    PS_TO_MANAGER,
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    PS_FROM_MANAGER,
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    PS_PREEMPT
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} pschange_type;
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typedef sysarg_t pstid_t;
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typedef sysarg_t pstid_t;
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struct psthread_data {
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struct psthread_data {
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    link_t link;
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    link_t link;
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    context_t ctx;
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    context_t ctx;
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extern int context_save(context_t *c);
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extern int context_save(context_t *c);
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extern void context_restore(context_t *c) __attribute__ ((noreturn));
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extern void context_restore(context_t *c) __attribute__ ((noreturn));
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pstid_t psthread_create(int (*func)(void *), void *arg);
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pstid_t psthread_create(int (*func)(void *), void *arg);
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int psthread_schedule_next(void);
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int psthread_join(pstid_t psthrid);
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int psthread_join(pstid_t psthrid);
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psthread_data_t * psthread_setup(tcb_t *tcb);
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psthread_data_t * psthread_setup(void);
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void psthread_teardown(psthread_data_t *pt);
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void psthread_teardown(psthread_data_t *pt);
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int psthread_schedule_next_adv(pschange_type ctype);
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void psthread_add_ready(pstid_t ptid);
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void psthread_add_manager(pstid_t psthrid);
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void psthread_remove_manager(void);
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static inline int psthread_schedule_next() {
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    return psthread_schedule_next_adv(PS_PREEMPT);
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}
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#endif
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#endif