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author | Sam Hartman <hartmans@mit.edu> | 2011-09-28 20:55:18 +0000 |
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committer | Sam Hartman <hartmans@mit.edu> | 2011-09-28 20:55:18 +0000 |
commit | 43b0bdc2bfbb8ce198a0f031e394bcc35cde12f3 (patch) | |
tree | a75b35f72a0068981004b3fcc6b664981ae30a94 /src/windows/lib/loadfuncs.c | |
parent | ebf757101939bf391061c366ecec8d34b4c190c3 (diff) | |
download | krb5-43b0bdc2bfbb8ce198a0f031e394bcc35cde12f3.tar.gz krb5-43b0bdc2bfbb8ce198a0f031e394bcc35cde12f3.tar.xz krb5-43b0bdc2bfbb8ce198a0f031e394bcc35cde12f3.zip |
Moved LoadFuncs/UnloadFuncs() to windows/lib
Signed-off-by: Alexey Melnikov <aamelnikov@gmail.com>
git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25257 dc483132-0cff-0310-8789-dd5450dbe970
Diffstat (limited to 'src/windows/lib/loadfuncs.c')
-rw-r--r-- | src/windows/lib/loadfuncs.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/windows/lib/loadfuncs.c b/src/windows/lib/loadfuncs.c new file mode 100644 index 0000000000..44ec54dfaa --- /dev/null +++ b/src/windows/lib/loadfuncs.c @@ -0,0 +1,88 @@ +#define WIN32_LEAN_AND_MEAN +#include <windows.h> +#include "loadfuncs.h" + +// +// UnloadFuncs: +// +// This function will reset all the function pointers of a function loaded +// by LaodFuncs and will free the DLL instance provided. +// + +void +UnloadFuncs( + FUNC_INFO fi[], + HINSTANCE h + ) +{ + int n; + if (fi) + for (n = 0; fi[n].func_ptr_var; n++) + *(fi[n].func_ptr_var) = NULL; + if (h) FreeLibrary(h); +} + + +// +// LoadFuncs: +// +// This function try to load the functions for a DLL. It returns 0 on failure +// and non-zero on success. The parameters are descibed below. +// + +int +LoadFuncs( + const char* dll_name, + FUNC_INFO fi[], + HINSTANCE* ph, // [out, optional] - DLL handle + int* pindex, // [out, optional] - index of last func loaded (-1 if none) + int cleanup, // cleanup function pointers and unload on error + int go_on, // continue loading even if some functions cannot be loaded + int silent // do not pop-up a system dialog if DLL cannot be loaded + + ) +{ + HINSTANCE h; + int i, n, last_i; + int error = 0; + UINT em; + + if (ph) *ph = 0; + if (pindex) *pindex = -1; + + for (n = 0; fi[n].func_ptr_var; n++) + *(fi[n].func_ptr_var) = NULL; + + if (silent) + em = SetErrorMode(SEM_FAILCRITICALERRORS); + h = LoadLibrary(dll_name); + if (silent) + SetErrorMode(em); + + if (!h) + return 0; + + last_i = -1; + for (i = 0; (go_on || !error) && (i < n); i++) + { + void* p = (void*)GetProcAddress(h, fi[i].func_name); + if (!p) + error = 1; + else + { + last_i = i; + *(fi[i].func_ptr_var) = p; + } + } + if (pindex) *pindex = last_i; + if (error && cleanup && !go_on) { + for (i = 0; i < n; i++) { + *(fi[i].func_ptr_var) = NULL; + } + FreeLibrary(h); + return 0; + } + if (ph) *ph = h; + if (error) return 0; + return 1; +} |