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Redesigned DirectPlay locking code as deadlocks could occur inside IDirectPlaySP_GetSPData call. Release more resources in IPX_ShutdownEx.

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This commit is contained in:
Daniel Collins 2011-09-28 19:10:08 +00:00
parent 7c822c97b6
commit 49119b4831
1 changed files with 45 additions and 58 deletions
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103
src/directplay.c
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@ -38,11 +38,8 @@ struct sp_data {
BOOL running;
HANDLE worker_thread;
WSAEVENT event;
};
struct sp_data_cont {
struct sp_data *data;
HANDLE mutex;
CRITICAL_SECTION lock;
};
#define DISCOVERY_SOCKET 42367
@ -52,32 +49,23 @@ struct sp_data_cont {
/* Lock the object mutex and return the data pointer */
static struct sp_data *get_sp_data(IDirectPlaySP *sp) {
struct sp_data_cont *cont;
struct sp_data *data;
DWORD size;
HRESULT r = IDirectPlaySP_GetSPData(sp, (void**)&cont, &size, DPGET_LOCAL);
HRESULT r = IDirectPlaySP_GetSPData(sp, (void**)&data, &size, DPGET_LOCAL);
if(r != DP_OK) {
log_printf("GetSPData: %d", (int)r);
abort();
}
WaitForSingleObject(cont->mutex, INFINITE);
EnterCriticalSection(&(data->lock));
return cont->data;
return data;
}
/* Release the object mutex */
static void release_sp_data(IDirectPlaySP *sp) {
struct sp_data_cont *cont;
DWORD size;
HRESULT r = IDirectPlaySP_GetSPData(sp, (void**)&cont, &size, DPGET_LOCAL);
if(r != DP_OK) {
log_printf("GetSPData: %d", (int)r);
abort();
}
ReleaseMutex(cont->mutex);
static void release_sp_data(struct sp_data *data) {
LeaveCriticalSection(&(data->lock));
}
static BOOL recv_packet(int sockfd, char *buf, IDirectPlaySP *sp) {
@ -104,7 +92,7 @@ static BOOL recv_packet(int sockfd, char *buf, IDirectPlaySP *sp) {
static DWORD WINAPI worker_main(LPVOID sp) {
struct sp_data *sp_data = get_sp_data((IDirectPlaySP*)sp);
release_sp_data((IDirectPlaySP*)sp);
release_sp_data(sp_data);
char *buf = malloc(MAX_DATA_SIZE);
if(!buf) {
@ -119,11 +107,11 @@ static DWORD WINAPI worker_main(LPVOID sp) {
WSAResetEvent(sp_data->event);
if(!sp_data->running) {
release_sp_data((IDirectPlaySP*)sp);
release_sp_data(sp_data);
return 0;
}
release_sp_data((IDirectPlaySP*)sp);
release_sp_data(sp_data);
if(!recv_packet(sp_data->sock, buf, sp)) {
return 1;
@ -137,7 +125,7 @@ static DWORD WINAPI worker_main(LPVOID sp) {
closesocket(sp_data->ns_sock);
sp_data->ns_sock = -1;
release_sp_data((IDirectPlaySP*)sp);
release_sp_data(sp_data);
}
}
@ -148,7 +136,7 @@ static BOOL init_worker(IDirectPlaySP *sp) {
struct sp_data *sp_data = get_sp_data(sp);
if(sp_data->worker_thread) {
release_sp_data(sp);
release_sp_data(sp_data);
return TRUE;
}
@ -156,11 +144,11 @@ static BOOL init_worker(IDirectPlaySP *sp) {
if(!sp_data->worker_thread) {
log_printf("Failed to create worker thread");
release_sp_data(sp);
release_sp_data(sp_data);
return FALSE;
}
release_sp_data(sp);
release_sp_data(sp_data);
return TRUE;
}
@ -183,11 +171,11 @@ static HRESULT WINAPI IPX_EnumSessions(LPDPSP_ENUMSESSIONSDATA data) {
if(sendto(sp_data->sock, data->lpMessage + API_HEADER_SIZE, data->dwMessageSize - API_HEADER_SIZE, 0, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
log_printf("sendto failed: %s", w32_error(WSAGetLastError()));
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DPERR_GENERIC;
}
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DP_OK;
}
@ -213,18 +201,18 @@ static HRESULT WINAPI IPX_Send(LPDPSP_SENDDATA data) {
if(!addr) {
log_printf("No known address for player ID %u, dropping packet", data->idPlayerTo);
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DP_OK;
}
if(sendto(sp_data->sock, data->lpMessage + API_HEADER_SIZE, data->dwMessageSize - API_HEADER_SIZE, 0, (struct sockaddr*)addr, sizeof(*addr)) == -1) {
log_printf("sendto failed: %s", w32_error(WSAGetLastError()));
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DPERR_GENERIC;
}
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DP_OK;
}
@ -284,11 +272,11 @@ static HRESULT WINAPI IPX_Reply(LPDPSP_REPLYDATA data) {
if(sendto(sp_data->sock, data->lpMessage + API_HEADER_SIZE, data->dwMessageSize - API_HEADER_SIZE, 0, (struct sockaddr*)data->lpSPMessageHeader, sizeof(struct sockaddr_ipx)) == -1) {
log_printf("sendto failed: %s", w32_error(WSAGetLastError()));
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DPERR_GENERIC;
}
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DP_OK;
}
@ -343,7 +331,7 @@ static HRESULT WINAPI IPX_Open(LPDPSP_OPENDATA data) {
if(data->bCreate) {
if(sp_data->ns_sock == -1) {
if((sp_data->ns_sock = socket(AF_IPX, SOCK_DGRAM, NSPROTO_IPX)) == -1) {
release_sp_data(data->lpISP);
release_sp_data(sp_data);
log_printf("Cannot create ns_sock: %s", w32_error(WSAGetLastError()));
return DPERR_CANNOTCREATESERVER;
@ -362,7 +350,7 @@ static HRESULT WINAPI IPX_Open(LPDPSP_OPENDATA data) {
closesocket(sp_data->ns_sock);
sp_data->ns_sock = -1;
release_sp_data(data->lpISP);
release_sp_data(sp_data);
log_printf("Cannot bind ns_sock: %s", w32_error(WSAGetLastError()));
return DPERR_CANNOTCREATESERVER;
@ -372,7 +360,7 @@ static HRESULT WINAPI IPX_Open(LPDPSP_OPENDATA data) {
closesocket(sp_data->ns_sock);
sp_data->ns_sock = -1;
release_sp_data(data->lpISP);
release_sp_data(sp_data);
log_printf("WSAEventSelect failed: %s", w32_error(WSAGetLastError()));
return DPERR_CANNOTCREATESERVER;
@ -383,7 +371,7 @@ static HRESULT WINAPI IPX_Open(LPDPSP_OPENDATA data) {
sp_data->ns_id = 0;
}
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DP_OK;
}
@ -397,7 +385,7 @@ static HRESULT WINAPI IPX_CloseEx(LPDPSP_CLOSEDATA data) {
sp_data->ns_sock = -1;
}
release_sp_data(data->lpISP);
release_sp_data(sp_data);
return DP_OK;
}
@ -409,7 +397,7 @@ static HRESULT WINAPI IPX_ShutdownEx(LPDPSP_SHUTDOWNDATA data) {
sp_data->running = FALSE;
WSASetEvent(sp_data->event);
release_sp_data(data->lpISP);
release_sp_data(sp_data);
if(sp_data->worker_thread) {
if(WaitForSingleObject(sp_data->worker_thread, 3000) == WAIT_TIMEOUT) {
@ -421,12 +409,14 @@ static HRESULT WINAPI IPX_ShutdownEx(LPDPSP_SHUTDOWNDATA data) {
sp_data->worker_thread = NULL;
}
closesocket(sp_data->sock);
if(sp_data->ns_sock != -1) {
closesocket(sp_data->ns_sock);
}
closesocket(sp_data->sock);
WSACloseEvent(sp_data->event);
DeleteCriticalSection(&(sp_data->lock));
return DP_OK;
}
@ -440,16 +430,16 @@ HRESULT WINAPI SPInit(LPSPINITDATA data) {
log_printf("SPInit: %p", data->lpISP);
{
struct sp_data_cont *cont;
struct sp_data *sp_data;
DWORD size;
HRESULT r = IDirectPlaySP_GetSPData(data->lpISP, (void**)&cont, &size, DPGET_LOCAL);
HRESULT r = IDirectPlaySP_GetSPData(data->lpISP, (void**)&sp_data, &size, DPGET_LOCAL);
if(r != DP_OK) {
log_printf("SPInit: GetSPData: %d", r);
return DPERR_UNAVAILABLE;
}
if(cont) {
if(sp_data) {
log_printf("SPInit: Already initialised, returning DP_OK");
return DP_OK;
}
@ -460,14 +450,15 @@ HRESULT WINAPI SPInit(LPSPINITDATA data) {
return DPERR_UNAVAILABLE;
}
HANDLE mutex = CreateMutex(NULL, FALSE, NULL);
if(!mutex) {
if(!InitializeCriticalSectionAndSpinCount(&(sp_data->lock), 0x80000000)) {
log_printf("Error creating critical section: %s", w32_error(GetLastError()));
free(sp_data);
return DPERR_UNAVAILABLE;
}
if((sp_data->event = WSACreateEvent()) == WSA_INVALID_EVENT) {
CloseHandle(mutex);
DeleteCriticalSection(&(sp_data->lock));
free(sp_data);
return DPERR_UNAVAILABLE;
@ -475,7 +466,7 @@ HRESULT WINAPI SPInit(LPSPINITDATA data) {
if((sp_data->sock = socket(AF_IPX, SOCK_DGRAM, NSPROTO_IPX)) == -1) {
WSACloseEvent(sp_data->event);
CloseHandle(mutex);
DeleteCriticalSection(&(sp_data->lock));
free(sp_data);
return DPERR_UNAVAILABLE;
@ -489,7 +480,7 @@ HRESULT WINAPI SPInit(LPSPINITDATA data) {
if(bind(sp_data->sock, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
closesocket(sp_data->sock);
WSACloseEvent(sp_data->event);
CloseHandle(mutex);
DeleteCriticalSection(&(sp_data->lock));
free(sp_data);
return DPERR_UNAVAILABLE;
@ -502,7 +493,7 @@ HRESULT WINAPI SPInit(LPSPINITDATA data) {
closesocket(sp_data->sock);
WSACloseEvent(sp_data->event);
CloseHandle(mutex);
DeleteCriticalSection(&(sp_data->lock));
free(sp_data);
return DPERR_UNAVAILABLE;
@ -521,23 +512,19 @@ HRESULT WINAPI SPInit(LPSPINITDATA data) {
closesocket(sp_data->sock);
WSACloseEvent(sp_data->event);
CloseHandle(mutex);
DeleteCriticalSection(&(sp_data->lock));
free(sp_data);
return DPERR_UNAVAILABLE;
}
struct sp_data_cont cont;
cont.data = sp_data;
cont.mutex = mutex;
HRESULT r = IDirectPlaySP_SetSPData(data->lpISP, &cont, sizeof(cont), DPSET_LOCAL);
HRESULT r = IDirectPlaySP_SetSPData(data->lpISP, sp_data, sizeof(*sp_data), DPSET_LOCAL);
if(r != DP_OK) {
log_printf("SetSPData: %d", (int)r);
closesocket(sp_data->sock);
WSACloseEvent(sp_data->event);
CloseHandle(mutex);
DeleteCriticalSection(&(sp_data->lock));
free(sp_data);
return DPERR_UNAVAILABLE;