1 : /*
2 : * Copyright (c) 2012 The Native Client Authors. All rights reserved.
3 : * Use of this source code is governed by a BSD-style license that can be
4 : * found in the LICENSE file.
5 : */
6 :
7 : /*
8 : * NaCl Service Runtime. Condition Variable Descriptor / Handle abstraction.
9 : */
10 :
11 : #include "native_client/src/include/portability.h"
12 :
13 : #include <stdlib.h>
14 : #include <string.h>
15 :
16 : #include "native_client/src/shared/imc/nacl_imc_c.h"
17 : #include "native_client/src/trusted/desc/nacl_desc_base.h"
18 : #include "native_client/src/trusted/desc/nacl_desc_mutex.h"
19 : #include "native_client/src/trusted/desc/nacl_desc_cond.h"
20 :
21 : #include "native_client/src/shared/platform/nacl_host_desc.h"
22 : #include "native_client/src/shared/platform/nacl_log.h"
23 :
24 : #include "native_client/src/trusted/service_runtime/nacl_config.h"
25 :
26 : #include "native_client/src/trusted/service_runtime/include/bits/mman.h"
27 : #include "native_client/src/trusted/service_runtime/include/sys/errno.h"
28 : #include "native_client/src/trusted/service_runtime/include/sys/fcntl.h"
29 : #include "native_client/src/trusted/service_runtime/include/sys/stat.h"
30 :
31 : /*
32 : * This file contains the implementation for the NaClDescCondVar subclass
33 : * of NaClDesc.
34 : *
35 : * NaClDescCondVar is the subclass that wraps host-OS condition
36 : * variable abstractions
37 : */
38 :
39 : static struct NaClDescVtbl const kNaClDescCondVarVtbl; /* fwd */
40 :
41 0 : int NaClDescCondVarCtor(struct NaClDescCondVar *self) {
42 0 : struct NaClDesc *basep = (struct NaClDesc *) self;
43 :
44 0 : basep->base.vtbl = (struct NaClRefCountVtbl const *) NULL;
45 0 : if (!NaClDescCtor(basep)) {
46 0 : return 0;
47 : }
48 0 : if (!NaClIntrCondVarCtor(&self->cv)) {
49 0 : (*basep->base.vtbl->Dtor)(&basep->base);
50 0 : return 0;
51 : }
52 :
53 0 : basep->base.vtbl = (struct NaClRefCountVtbl const *) &kNaClDescCondVarVtbl;
54 0 : return 1;
55 0 : }
56 :
57 0 : static void NaClDescCondVarDtor(struct NaClRefCount *vself) {
58 0 : struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
59 :
60 0 : NaClLog(4, "NaClDescCondVarDtor(0x%08"NACL_PRIxPTR").\n",
61 : (uintptr_t) vself);
62 0 : NaClIntrCondVarDtor(&self->cv);
63 :
64 0 : vself->vtbl = (struct NaClRefCountVtbl const *) &kNaClDescVtbl;
65 0 : (*vself->vtbl->Dtor)(vself);
66 0 : }
67 :
68 0 : static int NaClDescCondVarFstat(struct NaClDesc *vself,
69 0 : struct nacl_abi_stat *statbuf) {
70 0 : UNREFERENCED_PARAMETER(vself);
71 :
72 0 : memset(statbuf, 0, sizeof *statbuf);
73 0 : statbuf->nacl_abi_st_mode = NACL_ABI_S_IFCOND | NACL_ABI_S_IRWXU;
74 0 : return 0;
75 : }
76 :
77 0 : static int NaClDescCondVarWait(struct NaClDesc *vself,
78 0 : struct NaClDesc *mutex) {
79 0 : struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
80 0 : struct NaClDescMutex *mutex_desc;
81 0 : NaClSyncStatus status;
82 :
83 0 : if (((struct NaClDescVtbl const *) mutex->base.vtbl)->
84 : typeTag != NACL_DESC_MUTEX) {
85 0 : return -NACL_ABI_EINVAL;
86 : }
87 0 : mutex_desc = (struct NaClDescMutex *)mutex;
88 0 : status = NaClIntrCondVarWait(&self->cv,
89 : &mutex_desc->mu,
90 : NULL);
91 0 : return -NaClXlateNaClSyncStatus(status);
92 0 : }
93 :
94 0 : static int NaClDescCondVarTimedWaitAbs(struct NaClDesc *vself,
95 0 : struct NaClDesc *mutex,
96 0 : struct nacl_abi_timespec const *ts) {
97 0 : struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
98 0 : struct NaClDescMutex *mutex_desc;
99 0 : NaClSyncStatus status;
100 :
101 0 : if (((struct NaClDescVtbl const *) mutex->base.vtbl)->
102 : typeTag != NACL_DESC_MUTEX) {
103 0 : return -NACL_ABI_EINVAL;
104 : }
105 0 : mutex_desc = (struct NaClDescMutex *) mutex;
106 :
107 0 : status = NaClIntrCondVarWait(&self->cv,
108 : &mutex_desc->mu,
109 : ts);
110 0 : return -NaClXlateNaClSyncStatus(status);
111 0 : }
112 :
113 0 : static int NaClDescCondVarSignal(struct NaClDesc *vself) {
114 0 : struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
115 0 : NaClSyncStatus status = NaClIntrCondVarSignal(&self->cv);
116 :
117 0 : return -NaClXlateNaClSyncStatus(status);
118 : }
119 :
120 0 : static int NaClDescCondVarBroadcast(struct NaClDesc *vself) {
121 0 : struct NaClDescCondVar *self = (struct NaClDescCondVar *) vself;
122 0 : NaClSyncStatus status = NaClIntrCondVarBroadcast(&self->cv);
123 :
124 0 : return -NaClXlateNaClSyncStatus(status);
125 : }
126 :
127 : static struct NaClDescVtbl const kNaClDescCondVarVtbl = {
128 : {
129 : NaClDescCondVarDtor,
130 : },
131 : NaClDescMapNotImplemented,
132 : NACL_DESC_UNMAP_NOT_IMPLEMENTED
133 : NaClDescReadNotImplemented,
134 : NaClDescWriteNotImplemented,
135 : NaClDescSeekNotImplemented,
136 : NaClDescPReadNotImplemented,
137 : NaClDescPWriteNotImplemented,
138 : NaClDescCondVarFstat,
139 : NaClDescGetdentsNotImplemented,
140 : NaClDescExternalizeSizeNotImplemented,
141 : NaClDescExternalizeNotImplemented,
142 : NaClDescLockNotImplemented,
143 : NaClDescTryLockNotImplemented,
144 : NaClDescUnlockNotImplemented,
145 : NaClDescCondVarWait,
146 : NaClDescCondVarTimedWaitAbs,
147 : NaClDescCondVarSignal,
148 : NaClDescCondVarBroadcast,
149 : NaClDescSendMsgNotImplemented,
150 : NaClDescRecvMsgNotImplemented,
151 : NaClDescLowLevelSendMsgNotImplemented,
152 : NaClDescLowLevelRecvMsgNotImplemented,
153 : NaClDescConnectAddrNotImplemented,
154 : NaClDescAcceptConnNotImplemented,
155 : NaClDescPostNotImplemented,
156 : NaClDescSemWaitNotImplemented,
157 : NaClDescGetValueNotImplemented,
158 : NaClDescSetMetadata,
159 : NaClDescGetMetadata,
160 : NaClDescSetFlags,
161 : NaClDescGetFlags,
162 : NaClDescIsattyNotImplemented,
163 : NACL_DESC_CONDVAR,
164 : };
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