14 void eMrwlock_read_enter(eMrwlock_t *rw, char *file, int line)  in eMrwlock_read_enter()  argument
16 	if (rw->eMrw_magic != EMM_MAGIC) {  in eMrwlock_read_enter()
18 			rw->eMrw_owner, rw, rw->eMrw_magic);  in eMrwlock_read_enter()
21 	if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {  in eMrwlock_read_enter()
24 			rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);  in eMrwlock_read_enter()
27 	rw->eMrw_read++;  in eMrwlock_read_enter()
28 	rw->eMrw_heldin = file;  in eMrwlock_read_enter()
29 	rw->eMrw_heldat = line;  in eMrwlock_read_enter()
33 void eMrwlock_write_enter(eMrwlock_t *rw, char *file, int line)  in eMrwlock_write_enter()  argument
35 	if (rw->eMrw_magic != EMM_MAGIC) {  in eMrwlock_write_enter()
37 			rw->eMrw_owner, rw, rw->eMrw_magic);  in eMrwlock_write_enter()
40 	if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {  in eMrwlock_write_enter()
43 			rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);  in eMrwlock_write_enter()
46 	rw->eMrw_write++;  in eMrwlock_write_enter()
47 	rw->eMrw_heldin = file;  in eMrwlock_write_enter()
48 	rw->eMrw_heldat = line;  in eMrwlock_write_enter()
52 void eMrwlock_try_upgrade(eMrwlock_t *rw, char *file, int line)  in eMrwlock_try_upgrade()  argument
54 	if (rw->eMrw_magic != EMM_MAGIC) {  in eMrwlock_try_upgrade()
56 			rw->eMrw_owner, rw, rw->eMrw_magic);  in eMrwlock_try_upgrade()
59 	if (rw->eMrw_read != 0 || rw->eMrw_write != 0) {  in eMrwlock_try_upgrade()
62 			rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);  in eMrwlock_try_upgrade()
65 	rw->eMrw_write++;  in eMrwlock_try_upgrade()
66 	rw->eMrw_heldin = file;  in eMrwlock_try_upgrade()
67 	rw->eMrw_heldat = line;  in eMrwlock_try_upgrade()
70 void eMrwlock_downgrade(eMrwlock_t *rw, char *file, int line)  in eMrwlock_downgrade()  argument
72 	if (rw->eMrw_magic != EMM_MAGIC) {  in eMrwlock_downgrade()
74 			rw->eMrw_owner, rw, rw->eMrw_magic);  in eMrwlock_downgrade()
77 	if (rw->eMrw_read != 0 || rw->eMrw_write != 1) {  in eMrwlock_downgrade()
80 			rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);  in eMrwlock_downgrade()
83 	rw->eMrw_write--;  in eMrwlock_downgrade()
84 	rw->eMrw_read++;  in eMrwlock_downgrade()
85 	rw->eMrw_heldin = file;  in eMrwlock_downgrade()
86 	rw->eMrw_heldat = line;  in eMrwlock_downgrade()
90 void eMrwlock_exit(eMrwlock_t *rw)  in eMrwlock_exit()  argument
92 	if (rw->eMrw_magic != EMM_MAGIC) {  in eMrwlock_exit()
94 			rw->eMrw_owner, rw, rw->eMrw_magic);  in eMrwlock_exit()
97 	if (rw->eMrw_read != 1 && rw->eMrw_write != 1) {  in eMrwlock_exit()
99 			rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write);  in eMrwlock_exit()
102 	if (rw->eMrw_read == 1)  in eMrwlock_exit()
103 		rw->eMrw_read--;  in eMrwlock_exit()
104 	else if (rw->eMrw_write == 1)  in eMrwlock_exit()
105 		rw->eMrw_write--;  in eMrwlock_exit()
106 	rw->eMrw_heldin = NULL;  in eMrwlock_exit()
107 	rw->eMrw_heldat = 0;  in eMrwlock_exit()
113 void eMrwlock_init(eMrwlock_t *rw, char *who)  in eMrwlock_init()  argument
115 	if (rw->eMrw_magic == EMM_MAGIC) {	/* safe bet ? */  in eMrwlock_init()
118 			rw->eMrw_owner, rw, rw->eMrw_magic);  in eMrwlock_init()
121 	rw->eMrw_magic = EMM_MAGIC;  in eMrwlock_init()
122 	rw->eMrw_read = 0;  in eMrwlock_init()
123 	rw->eMrw_write = 0;  in eMrwlock_init()
125 		rw->eMrw_owner = strdup(who);  in eMrwlock_init()
127 		rw->eMrw_owner = NULL;  in eMrwlock_init()
132 void eMrwlock_destroy(eMrwlock_t *rw)  in eMrwlock_destroy()  argument
134 	if (rw->eMrw_magic != EMM_MAGIC) {  in eMrwlock_destroy()
136 			rw->eMrw_owner, rw, rw->eMrw_magic);  in eMrwlock_destroy()
139 	if (rw->eMrw_owner != NULL)  in eMrwlock_destroy()
140 		free(rw->eMrw_owner);  in eMrwlock_destroy()
141 	memset(rw, 0xa5, sizeof(*rw));  in eMrwlock_destroy()