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nt: squelch novelty GCC 8 cast-function-type warnings

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This commit is contained in:
Bert Belder 2018-09-06 19:53:13 +02:00
parent 21deebe236
commit 9a2efd9db7
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GPG Key ID: 7A77887B2E2ED461
1 changed files with 18 additions and 4 deletions
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20
src/nt.c
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@ -3,6 +3,18 @@
#include "nt.h"
#include "win.h"
/* Set up a workaround for the following problem:
* FARPROC addr = GetProcAddress(...);
* MY_FUNC func = (MY_FUNC) addr; <-- GCC 8 warning/error.
* MY_FUNC func = (MY_FUNC) (void*) addr; <-- MSVC warning/error.
* To compile cleanly with either compiler, do casts with this "bridge" type:
* MY_FUNC func = (MY_FUNC) (nt__fn_ptr_cast_t) addr; */
#ifdef __GNUC__
typedef void* nt__fn_ptr_cast_t;
#else
typedef FARPROC nt__fn_ptr_cast_t;
#endif
#define X(return_type, attributes, name, parameters) \
WEPOLL_INTERNAL return_type(attributes* name) parameters = NULL;
NT_NTDLL_IMPORT_LIST(X)
@ -10,15 +22,17 @@ NT_NTDLL_IMPORT_LIST(X)
int nt_global_init(void) {
HMODULE ntdll;
FARPROC fn_ptr;
ntdll = GetModuleHandleW(L"ntdll.dll");
if (ntdll == NULL)
return -1;
#define X(return_type, attributes, name, parameters) \
name = (return_type(attributes*) parameters) GetProcAddress(ntdll, #name); \
if (name == NULL) \
return -1;
fn_ptr = GetProcAddress(ntdll, #name); \
if (fn_ptr == NULL) \
return -1; \
name = (return_type(attributes*) parameters)(nt__fn_ptr_cast_t) fn_ptr;
NT_NTDLL_IMPORT_LIST(X)
#undef X