projects / apple / security.git / blame
| Commit | Line | Data |
|---|---|---|
| b1ab9ed8 | 1 | /* |
| d8f41ccd | 2 | * Copyright (c) 2000-2004,2011-2012,2014 Apple Inc. All Rights Reserved. |
| b1ab9ed8 A |
3 | * |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 12 | * | |
| 13 | * The Original Code and all software distributed under the License are | |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 20 | * | |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | ||
| 24 | ||
| 25 | // | |
| 26 | // globalizer - multiscope globalization services. | |
| 27 | // | |
| 28 | // This is a tentative, partial implementation. | |
| 29 | // Status: | |
| 30 | // module scope: constructs, optional cleanup | |
| 31 | // thread scope: constructs, optional cleanup | |
| 32 | // process scope: not implemented (obsolete implementation, unused) | |
| 33 | // system scope: not implemented (probably never will) | |
| 34 | // | |
| 35 | // @@@ Assumption: {bool,T*} atomic unless PTHREAD_STRICT | |
| 36 | // | |
| 37 | #include <security_utilities/globalizer.h> | |
| 38 | #include <security_utilities/debugging.h> | |
| 39 | #include <cstdlib> | |
| 40 | #include <stdexcept> | |
| 41 | ||
| 42 | // | |
| 43 | // The Error class thrown if Nexus operations fail | |
| 44 | // | |
| d64be36e | 45 | GlobalNexus::Error::~Error() _NOEXCEPT |
| b1ab9ed8 A |
46 | { |
| 47 | } | |
| 48 | ||
| 427c49bc A |
49 | void ModuleNexusCommon::do_create(void *(*make)()) |
| 50 | { | |
| 51 | try | |
| 52 | { | |
| 53 | pointer = make(); | |
| 54 | } | |
| 55 | catch (...) | |
| 56 | { | |
| 57 | pointer = NULL; | |
| 58 | } | |
| 59 | } | |
| 60 | ||
| 61 | ||
| b1ab9ed8 | 62 | |
| b1ab9ed8 A |
63 | void *ModuleNexusCommon::create(void *(*make)()) |
| 64 | { | |
| 427c49bc A |
65 | dispatch_once(&once, ^{do_create(make);}); |
| 66 | ||
| 67 | if (pointer == NULL) | |
| 68 | { | |
| 69 | ModuleNexusError::throwMe(); | |
| b1ab9ed8 | 70 | } |
| 427c49bc | 71 | |
| b1ab9ed8 A |
72 | return pointer; |
| 73 | } | |
| 74 | ||
| 75 | ||
| b1ab9ed8 A |
76 | // |
| 77 | // Process nexus operation | |
| 78 | // | |
| 79 | ProcessNexusBase::ProcessNexusBase(const char *identifier) | |
| 80 | { | |
| 81 | const char *env = getenv(identifier); | |
| 82 | if (env == NULL) { // perhaps we're first... | |
| d64be36e | 83 | unique_ptr<Store> store(new Store); |
| b1ab9ed8 A |
84 | char form[2*sizeof(Store *) + 2]; |
| 85 | sprintf(form, "*%p", &store); | |
| 86 | setenv(identifier, form, 0); // do NOT overwrite... | |
| 87 | env = getenv(identifier); // ... and refetch to resolve races | |
| 88 | if (sscanf(env, "*%p", &mStore) != 1) | |
| 89 | throw std::runtime_error("environment communication failed"); | |
| 90 | if (mStore == store.get()) // we won the race... | |
| 91 | store.release(); // ... so keep the store | |
| 92 | } else | |
| 93 | if (sscanf(env, "*%p", &mStore) != 1) | |
| 94 | throw std::runtime_error("environment communication failed"); | |
| 95 | } |