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#ifdef USE_ITHREADS
typedef struct {
SV *sv; /* The actual SV */
perl_mutex mutex; /* Our mutex */
perl_cond cond; /* Our condition variable */
perl_cond user_cond; /* For user-level conditions */
IV locks; /* Number of locks held */
PerlInterpreter *owner; /* Who owns the lock? */
U16 index; /* Update index */
} shared_sv;
#define SHAREDSvGET(a) (a->sv)
#define SHAREDSvLOCK(a) Perl_sharedsv_lock(aTHX_ a)
#define SHAREDSvUNLOCK(a) Perl_sharedsv_unlock(aTHX_ a)
#define SHAREDSvEDIT(a) STMT_START { \
MUTEX_LOCK(&PL_sharedsv_space_mutex); \
SHAREDSvLOCK((a)); \
PERL_SET_CONTEXT(PL_sharedsv_space); \
} STMT_END
#define SHAREDSvRELEASE(a) STMT_START { \
PERL_SET_CONTEXT((a)->owner); \
SHAREDSvUNLOCK((a)); \
MUTEX_UNLOCK(&PL_sharedsv_space_mutex); \
} STMT_END
#endif /* USE_ITHREADS */
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