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Programming—Chapter 7
261700 Series Color Mobile Computer User’s Manual
IOCTL_HAL_GET_RESET_INFO
This IOCTL code allows software to check the type of the most recent
reset.
Usage
#include “oemioctl.h”
Syntax
BOOL KernelIoControl( IOCTL_HAL_GET_RESET_INFO,LPVOID
lpInBuf,DWORD nInBufSize,LPVOID lpOutBuf,DWORD
nOutBufSize,LPDWORD lpBytesReturned );
Parameters
lpInBuf Should be set to NULL.
lpInBufSize Should be set to zero.
lpOutBuf Must point to a HAL_RESET_INFO structure. See sample below.
nOutBufSize ThesizeofHAL_RESET_INFOinbytes.
lpBytesReturned The nu mbe r of bytes retu rned by the function.
Return Values
Returns TRUE if function succeeds. Returns FALSE if the function fails.
GetLastError() may be used to get the extended error value.
Sample
typedef struct {
DWORD ResetReason; // most recent reset type
DWORD ObjectStoreState; // state of object store
} HAL_RESET_INFO, * PHAL_RESET_INFO;
// Reset reason types
#define HAL_RESET_TYPE_UNKNOWN 0
#define HAL_RESET_REASON_HARDWARE 1 // cold
#define HAL_RESET_REASON_SOFTWARE 2 // suspend
#define HAL_RESET_REASON_WATCHDOG 4
#define HAL_RESET_BATT_FAULT 8 // power fail
#define HAL_RESET_VDD_FAULT 16 // warm boot
// Object store state flags
#define HAL_OBJECT_STORE_STATE_UNKNOWN 0
#define HAL_OBJECT_STORE_STATE_CLEAR 1