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| Rev | Author | Line No. | Line |
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| 5564 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * |
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| 4 | * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the "Software"), |
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| 8 | * to deal in the Software without restriction, including without limitation |
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| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 11 | * Software is furnished to do so, subject to the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice shall be included |
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| 14 | * in all copies or substantial portions of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 17 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | */ |
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| 24 | |||
| 25 | |||
| 26 | #ifndef DLOPEN_H |
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| 27 | #define DLOPEN_H |
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| 28 | |||
| 29 | /** |
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| 30 | * Wrapper functions for dlopen(), dlsym(), dlclose(). |
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| 31 | * Note that the #ifdef tests for various environments should be expanded. |
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| 32 | */ |
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| 33 | |||
| 34 | #if defined(HAVE_DLOPEN) |
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| 35 | #include |
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| 36 | #endif |
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| 37 | #if defined(_WIN32) |
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| 38 | #include |
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| 39 | #endif |
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| 40 | |||
| 41 | typedef void (*GenericFunc)(void); |
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| 42 | |||
| 43 | /** |
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| 44 | * Wrapper for dlopen(). |
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| 45 | * Note that 'flags' isn't used at this time. |
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| 46 | */ |
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| 47 | static inline void * |
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| 48 | _mesa_dlopen(const char *libname, int flags) |
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| 49 | { |
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| 50 | #if defined(HAVE_DLOPEN) |
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| 51 | flags = RTLD_LAZY | RTLD_GLOBAL; /* Overriding flags at this time */ |
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| 52 | return dlopen(libname, flags); |
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| 53 | #elif defined(_WIN32) |
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| 54 | return LoadLibraryA(libname); |
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| 55 | #else |
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| 56 | return NULL; |
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| 57 | #endif |
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| 58 | } |
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| 59 | |||
| 60 | /** |
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| 61 | * Wrapper for dlsym() that does a cast to a generic function type, |
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| 62 | * rather than a void *. This reduces the number of warnings that are |
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| 63 | * generated. |
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| 64 | */ |
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| 65 | static inline GenericFunc |
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| 66 | _mesa_dlsym(void *handle, const char *fname) |
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| 67 | { |
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| 68 | union { |
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| 69 | void *v; |
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| 70 | GenericFunc f; |
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| 71 | } u; |
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| 72 | #if defined(HAVE_DLOPEN) |
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| 73 | u.v = dlsym(handle, fname); |
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| 74 | #elif defined(_WIN32) |
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| 75 | u.v = (void *) GetProcAddress(handle, fname); |
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| 76 | #else |
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| 77 | u.v = NULL; |
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| 78 | #endif |
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| 79 | return u.f; |
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| 80 | } |
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| 81 | |||
| 82 | /** |
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| 83 | * Wrapper for dlclose(). |
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| 84 | */ |
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| 85 | static inline void |
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| 86 | _mesa_dlclose(void *handle) |
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| 87 | { |
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| 88 | #if defined(HAVE_DLOPEN) |
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| 89 | dlclose(handle); |
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| 90 | #elif defined(_WIN32) |
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| 91 | FreeLibrary(handle); |
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| 92 | #else |
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| 93 | (void) handle; |
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| 94 | #endif |
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| 95 | } |
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| 96 | |||
| 97 | #endif |