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/*
* dll.c
*
* Description:
* This translation unit implements DLL initialisation.
*/
#include <windows.h>
#include <malloc.h>
#include "pthread.h"
#include "implement.h"
/* Function pointer to TryEnterCriticalSection if it exists; otherwise NULL */
BOOL (WINAPI *_pthread_try_enter_critical_section)(LPCRITICAL_SECTION) = NULL;
/* Handle to kernel32.dll */
static HINSTANCE _pthread_h_kernel32;
#ifdef _WIN32
/*
* lpvReserved yields an unreferenced formal parameter;
* ignore it
*/
#pragma warning( disable : 4100 )
#endif
BOOL WINAPI
DllMain (
HINSTANCE hinstDll,
DWORD fdwReason,
LPVOID lpvReserved
)
{
BOOL result = TRUE;
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
/*
* The DLL is being mapped into the process's address space
*/
result = _pthread_processInitialize ();
/* Load KERNEL32 and try to get address of TryEnterCriticalSection */
_pthread_h_kernel32 = LoadLibrary(TEXT("KERNEL32.DLL"));
_pthread_try_enter_critical_section =
(void *) GetProcAddress(_pthread_h_kernel32,
"TryEnterCriticalSection");
break;
case DLL_THREAD_ATTACH:
/*
* A thread is being created
*/
result = TRUE;
break;
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
/*
* A thread is exiting cleanly
* NOTE: The "main" thread detaches using
* DLL_PROCESS_DETACH
*/
{
pthread_t self;
if (_pthread_processInitialized)
{
self = (pthread_t) pthread_getspecific (_pthread_selfThreadKey);
/*
* Detached threads have their resources automatically
* cleaned up upon exit (others must be 'joined'
*/
if (self != NULL &&
self->detachState == PTHREAD_CREATE_DETACHED)
{
pthread_setspecific (_pthread_selfThreadKey, NULL);
_pthread_threadDestroy (self);
}
if (fdwReason == DLL_PROCESS_DETACH)
{
/*
* The DLL is being unmapped into the process's address space
*/
_pthread_processTerminate ();
}
}
(void) FreeLibrary(_pthread_h_kernel32);
result = TRUE;
}
break;
}
return (result);
} /* DllMain */
#if 0 /* Pre Bossom */
/* We use the DLL entry point function to set up per thread storage
specifically to hold the threads own thread ID.
The thread ID is stored by _pthread_start_call().
The thread ID is retrieved by pthread_self().
*/
/* Global index for TLS data. */
DWORD _pthread_threadID_TlsIndex;
/* Global index for thread TSD key array. */
DWORD _pthread_TSD_keys_TlsIndex;
/* Function pointer to TryEnterCriticalSection if it exists; otherwise NULL */
BOOL (WINAPI *_pthread_try_enter_critical_section)(LPCRITICAL_SECTION) = NULL;
/* Handle to kernel32.dll */
static HINSTANCE _pthread_h_kernel32;
BOOL WINAPI PthreadsEntryPoint(HINSTANCE dllHandle,
DWORD reason,
LPVOID situation)
{
switch (reason)
{
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
break;
case DLL_PROCESS_ATTACH:
/* Set up per thread thread ID storage. */
_pthread_threadID_TlsIndex = TlsAlloc();
if (_pthread_threadID_TlsIndex == 0xFFFFFFFF)
{
return FALSE;
}
/* Set up per thread TSD key array pointer. */
_pthread_TSD_keys_TlsIndex = TlsAlloc();
if (_pthread_TSD_keys_TlsIndex == 0xFFFFFFFF)
{
return FALSE;
}
/* Load KERNEL32 and try to get address of TryEnterCriticalSection */
_pthread_h_kernel32 = LoadLibrary(TEXT("KERNEL32.DLL"));
_pthread_try_enter_critical_section = (void *) GetProcAddress(_pthread_h_kernel32, "TryEnterCriticalSection");
break;
case DLL_PROCESS_DETACH:
(void) TlsFree(_pthread_TSD_keys_TlsIndex);
(void) TlsFree(_pthread_threadID_TlsIndex);
(void) FreeLibrary(_pthread_h_kernel32);
break;
default:
return FALSE;
}
return TRUE;
}
#endif /* Pre Bossom */
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