#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * The NtReleaseSemaphore routine increases the count of the specified semaphore object by a specified amount.
 *
 * \param SemaphoreHandle A handle to the semaphore object.
 * \param ReleaseCount The amount by which the semaphore object's count is to be increased.
 * \param PreviousCount A pointer to a variable that receives the previous count of the semaphore object.
 * \return NTSTATUS Successful or errant status.
 * \remarks Requires SEMAPHORE_MODIFY_STATE (0x2). ReleaseCount must be positive; zero or a
 * negative value returns STATUS_INVALID_PARAMETER. If the addition exceeds MaximumCount
 * or overflows the signed count, STATUS_SEMAPHORE_LIMIT_EXCEEDED is returned without
 * changing the count or writing PreviousCount. On success, PreviousCount receives the
 * count before the addition and may be NULL. Release does not require prior acquisition.
 */
_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
NtReleaseSemaphore(
    _In_ HANDLE SemaphoreHandle,
    _In_ LONG ReleaseCount,
    _Out_opt_ PLONG PreviousCount
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
ZwReleaseSemaphore(
    _In_ HANDLE SemaphoreHandle,
    _In_ LONG ReleaseCount,
    _Out_opt_ PLONG PreviousCount
    );

#endif
View code on GitHub