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118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
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#include "k32_vista.h"
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#include <ndk/exfuncs.h>
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#include <wine/config.h>
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#include <wine/port.h>
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/* Taken from Wine ntdll/sync.c */
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HANDLE keyed_event = NULL;
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static DWORD WINAPI RtlRunOnceBeginInitialize( RTL_RUN_ONCE *once, ULONG flags, void **context )
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{
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if (flags & RTL_RUN_ONCE_CHECK_ONLY)
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{
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ULONG_PTR val = (ULONG_PTR)once->Ptr;
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if (flags & RTL_RUN_ONCE_ASYNC) return STATUS_INVALID_PARAMETER;
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if ((val & 3) != 2) return STATUS_UNSUCCESSFUL;
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if (context) *context = (void *)(val & ~3);
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return STATUS_SUCCESS;
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}
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for (;;)
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{
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ULONG_PTR next, val = (ULONG_PTR)once->Ptr;
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switch (val & 3)
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{
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case 0: /* first time */
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if (!interlocked_cmpxchg_ptr( &once->Ptr,
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(flags & RTL_RUN_ONCE_ASYNC) ? (void *)3 : (void *)1, 0 ))
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return STATUS_PENDING;
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break;
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case 1: /* in progress, wait */
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if (flags & RTL_RUN_ONCE_ASYNC) return STATUS_INVALID_PARAMETER;
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next = val & ~3;
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if (interlocked_cmpxchg_ptr( &once->Ptr, (void *)((ULONG_PTR)&next | 1),
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(void *)val ) == (void *)val)
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NtWaitForKeyedEvent( keyed_event, &next, FALSE, NULL );
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break;
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case 2: /* done */
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if (context) *context = (void *)(val & ~3);
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return STATUS_SUCCESS;
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case 3: /* in progress, async */
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if (!(flags & RTL_RUN_ONCE_ASYNC)) return STATUS_INVALID_PARAMETER;
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return STATUS_PENDING;
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}
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}
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}
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static DWORD WINAPI RtlpRunOnceComplete( RTL_RUN_ONCE *once, ULONG flags, void *context )
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{
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if ((ULONG_PTR)context & 3) return STATUS_INVALID_PARAMETER;
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if (flags & RTL_RUN_ONCE_INIT_FAILED)
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{
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if (context) return STATUS_INVALID_PARAMETER;
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if (flags & RTL_RUN_ONCE_ASYNC) return STATUS_INVALID_PARAMETER;
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}
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else context = (void *)((ULONG_PTR)context | 2);
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for (;;)
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{
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ULONG_PTR val = (ULONG_PTR)once->Ptr;
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switch (val & 3)
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{
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case 1: /* in progress */
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if (interlocked_cmpxchg_ptr( &once->Ptr, context, (void *)val ) != (void *)val) break;
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val &= ~3;
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while (val)
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{
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ULONG_PTR next = *(ULONG_PTR *)val;
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NtReleaseKeyedEvent( keyed_event, (void *)val, FALSE, NULL );
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val = next;
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}
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return STATUS_SUCCESS;
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case 3: /* in progress, async */
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if (!(flags & RTL_RUN_ONCE_ASYNC)) return STATUS_INVALID_PARAMETER;
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if (interlocked_cmpxchg_ptr( &once->Ptr, context, (void *)val ) != (void *)val) break;
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return STATUS_SUCCESS;
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default:
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return STATUS_UNSUCCESSFUL;
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}
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}
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}
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static DWORD WINAPI RtlpRunOnceExecuteOnce( RTL_RUN_ONCE *once, PRTL_RUN_ONCE_INIT_FN func,
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void *param, void **context )
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{
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DWORD ret = RtlRunOnceBeginInitialize( once, 0, context );
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if (ret != STATUS_PENDING) return ret;
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if (!func( once, param, context ))
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{
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RtlpRunOnceComplete( once, RTL_RUN_ONCE_INIT_FAILED, NULL );
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return STATUS_UNSUCCESSFUL;
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}
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return RtlpRunOnceComplete( once, 0, context ? *context : NULL );
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}
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/* Taken from Wine kernel32/sync.c */
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/*
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* @implemented
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*/
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BOOL NTAPI InitOnceExecuteOnce( INIT_ONCE *once, PINIT_ONCE_FN func, void *param, void **context )
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{
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return !RtlpRunOnceExecuteOnce( once, (PRTL_RUN_ONCE_INIT_FN)func, param, context );
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}
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