1*0Sstevel@tonic-gate #include "ipf.h" 2*0Sstevel@tonic-gate 3*0Sstevel@tonic-gate #define EMM_MAGIC 0x97dd8b3a 4*0Sstevel@tonic-gate 5*0Sstevel@tonic-gate void eMrwlock_read_enter(rw, file, line) 6*0Sstevel@tonic-gate eMrwlock_t *rw; 7*0Sstevel@tonic-gate char *file; 8*0Sstevel@tonic-gate int line; 9*0Sstevel@tonic-gate { 10*0Sstevel@tonic-gate if (rw->eMrw_magic != EMM_MAGIC) { 11*0Sstevel@tonic-gate fprintf(stderr, "%s:eMrwlock_read_enter(%p): bad magic: %#x\n", 12*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_magic); 13*0Sstevel@tonic-gate abort(); 14*0Sstevel@tonic-gate } 15*0Sstevel@tonic-gate if (rw->eMrw_read != 0 || rw->eMrw_write != 0) { 16*0Sstevel@tonic-gate fprintf(stderr, 17*0Sstevel@tonic-gate "%s:eMrwlock_read_enter(%p): already locked: %d/%d\n", 18*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); 19*0Sstevel@tonic-gate abort(); 20*0Sstevel@tonic-gate } 21*0Sstevel@tonic-gate rw->eMrw_read++; 22*0Sstevel@tonic-gate rw->eMrw_heldin = file; 23*0Sstevel@tonic-gate rw->eMrw_heldat = line; 24*0Sstevel@tonic-gate } 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate void eMrwlock_write_enter(rw, file, line) 28*0Sstevel@tonic-gate eMrwlock_t *rw; 29*0Sstevel@tonic-gate char *file; 30*0Sstevel@tonic-gate int line; 31*0Sstevel@tonic-gate { 32*0Sstevel@tonic-gate if (rw->eMrw_magic != EMM_MAGIC) { 33*0Sstevel@tonic-gate fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n", 34*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_magic); 35*0Sstevel@tonic-gate abort(); 36*0Sstevel@tonic-gate } 37*0Sstevel@tonic-gate if (rw->eMrw_read != 0 || rw->eMrw_write != 0) { 38*0Sstevel@tonic-gate fprintf(stderr, 39*0Sstevel@tonic-gate "%s:eMrwlock_write_enter(%p): already locked: %d/%d\n", 40*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); 41*0Sstevel@tonic-gate abort(); 42*0Sstevel@tonic-gate } 43*0Sstevel@tonic-gate rw->eMrw_write++; 44*0Sstevel@tonic-gate rw->eMrw_heldin = file; 45*0Sstevel@tonic-gate rw->eMrw_heldat = line; 46*0Sstevel@tonic-gate } 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate void eMrwlock_downgrade(rw, file, line) 50*0Sstevel@tonic-gate eMrwlock_t *rw; 51*0Sstevel@tonic-gate char *file; 52*0Sstevel@tonic-gate int line; 53*0Sstevel@tonic-gate { 54*0Sstevel@tonic-gate if (rw->eMrw_magic != EMM_MAGIC) { 55*0Sstevel@tonic-gate fprintf(stderr, "%s:eMrwlock_write_enter(%p): bad magic: %#x\n", 56*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_magic); 57*0Sstevel@tonic-gate abort(); 58*0Sstevel@tonic-gate } 59*0Sstevel@tonic-gate if (rw->eMrw_read != 0 || rw->eMrw_write != 1) { 60*0Sstevel@tonic-gate fprintf(stderr, 61*0Sstevel@tonic-gate "%s:eMrwlock_write_enter(%p): already locked: %d/%d\n", 62*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); 63*0Sstevel@tonic-gate abort(); 64*0Sstevel@tonic-gate } 65*0Sstevel@tonic-gate rw->eMrw_write--; 66*0Sstevel@tonic-gate rw->eMrw_read++; 67*0Sstevel@tonic-gate rw->eMrw_heldin = file; 68*0Sstevel@tonic-gate rw->eMrw_heldat = line; 69*0Sstevel@tonic-gate } 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate void eMrwlock_exit(rw) 73*0Sstevel@tonic-gate eMrwlock_t *rw; 74*0Sstevel@tonic-gate { 75*0Sstevel@tonic-gate if (rw->eMrw_magic != EMM_MAGIC) { 76*0Sstevel@tonic-gate fprintf(stderr, "%s:eMrwlock_exit(%p): bad magic: %#x\n", 77*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_magic); 78*0Sstevel@tonic-gate abort(); 79*0Sstevel@tonic-gate } 80*0Sstevel@tonic-gate if (rw->eMrw_read != 1 && rw->eMrw_write != 1) { 81*0Sstevel@tonic-gate fprintf(stderr, "%s:eMrwlock_exit(%p): not locked: %d/%d\n", 82*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_read, rw->eMrw_write); 83*0Sstevel@tonic-gate abort(); 84*0Sstevel@tonic-gate } 85*0Sstevel@tonic-gate if (rw->eMrw_read == 1) 86*0Sstevel@tonic-gate rw->eMrw_read--; 87*0Sstevel@tonic-gate else if (rw->eMrw_write == 1) 88*0Sstevel@tonic-gate rw->eMrw_write--; 89*0Sstevel@tonic-gate rw->eMrw_heldin = NULL; 90*0Sstevel@tonic-gate rw->eMrw_heldat = 0; 91*0Sstevel@tonic-gate } 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate void eMrwlock_init(rw, who) 95*0Sstevel@tonic-gate eMrwlock_t *rw; 96*0Sstevel@tonic-gate char *who; 97*0Sstevel@tonic-gate { 98*0Sstevel@tonic-gate if (rw->eMrw_magic == EMM_MAGIC) { /* safe bet ? */ 99*0Sstevel@tonic-gate fprintf(stderr, 100*0Sstevel@tonic-gate "%s:eMrwlock_init(%p): already initialised?: %#x\n", 101*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_magic); 102*0Sstevel@tonic-gate abort(); 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate rw->eMrw_magic = EMM_MAGIC; 105*0Sstevel@tonic-gate rw->eMrw_read = 0; 106*0Sstevel@tonic-gate rw->eMrw_write = 0; 107*0Sstevel@tonic-gate if (who != NULL) 108*0Sstevel@tonic-gate rw->eMrw_owner = strdup(who); 109*0Sstevel@tonic-gate else 110*0Sstevel@tonic-gate rw->eMrw_owner = NULL; 111*0Sstevel@tonic-gate } 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate void eMrwlock_destroy(rw) 115*0Sstevel@tonic-gate eMrwlock_t *rw; 116*0Sstevel@tonic-gate { 117*0Sstevel@tonic-gate if (rw->eMrw_magic != EMM_MAGIC) { 118*0Sstevel@tonic-gate fprintf(stderr, "%s:eMrwlock_destroy(%p): bad magic: %#x\n", 119*0Sstevel@tonic-gate rw->eMrw_owner, rw, rw->eMrw_magic); 120*0Sstevel@tonic-gate abort(); 121*0Sstevel@tonic-gate } 122*0Sstevel@tonic-gate memset(rw, 0xa5, sizeof(*rw)); 123*0Sstevel@tonic-gate } 124