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Store the API device refcount on the device itself, so if the device is disconnected and we have multiple application references to it, we only free it once.

This commit is contained in:
Sam Lantinga 2018-09-17 11:35:24 -07:00
parent 59a2d12cc3
commit f6a537cbfa
1 changed files with 37 additions and 52 deletions
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89
src/hidapi/android/hid.cpp
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@ -35,7 +35,8 @@ typedef uint64_t uint64;
struct hid_device_ struct hid_device_
{ {
int nId; int m_nId;
int m_nDeviceRefCount;
}; };
static JavaVM *g_JVM; static JavaVM *g_JVM;
@ -397,29 +398,6 @@ public:
return m_pDevice; return m_pDevice;
} }
int GetDeviceRefCount()
{
return m_nDeviceRefCount;
}
int IncrementDeviceRefCount()
{
int nValue;
pthread_mutex_lock( &m_refCountLock );
nValue = ++m_nDeviceRefCount;
pthread_mutex_unlock( &m_refCountLock );
return nValue;
}
int DecrementDeviceRefCount()
{
int nValue;
pthread_mutex_lock( &m_refCountLock );
nValue = --m_nDeviceRefCount;
pthread_mutex_unlock( &m_refCountLock );
return nValue;
}
bool BOpen() bool BOpen()
{ {
// Make sure thread is attached to JVM/env // Make sure thread is attached to JVM/env
@ -463,8 +441,9 @@ public:
} }
m_pDevice = new hid_device; m_pDevice = new hid_device;
m_pDevice->nId = m_nId; m_pDevice->m_nId = m_nId;
m_nDeviceRefCount = 1; m_pDevice->m_nDeviceRefCount = 1;
LOGD("Creating device %d (%p), refCount = 1\n", m_pDevice->m_nId, m_pDevice);
return true; return true;
} }
@ -668,7 +647,6 @@ private:
hid_device_info *m_pInfo = nullptr; hid_device_info *m_pInfo = nullptr;
hid_device *m_pDevice = nullptr; hid_device *m_pDevice = nullptr;
bool m_bIsBLESteamController = false; bool m_bIsBLESteamController = false;
int m_nDeviceRefCount = 0;
pthread_mutex_t m_dataLock = PTHREAD_MUTEX_INITIALIZER; // This lock has to be held to access m_vecData pthread_mutex_t m_dataLock = PTHREAD_MUTEX_INITIALIZER; // This lock has to be held to access m_vecData
hid_buffer_pool m_vecData; hid_buffer_pool m_vecData;
@ -688,6 +666,7 @@ public:
class CHIDDevice; class CHIDDevice;
static pthread_mutex_t g_DevicesMutex = PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t g_DevicesMutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t g_DevicesRefCountMutex = PTHREAD_MUTEX_INITIALIZER;
static hid_device_ref<CHIDDevice> g_Devices; static hid_device_ref<CHIDDevice> g_Devices;
static hid_device_ref<CHIDDevice> FindDevice( int nDeviceId ) static hid_device_ref<CHIDDevice> FindDevice( int nDeviceId )
@ -943,14 +922,18 @@ HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path, int bEx
hid_device_ref< CHIDDevice > pDevice; hid_device_ref< CHIDDevice > pDevice;
{ {
hid_mutex_guard r( &g_DevicesRefCountMutex );
hid_mutex_guard l( &g_DevicesMutex ); hid_mutex_guard l( &g_DevicesMutex );
for ( hid_device_ref<CHIDDevice> pCurr = g_Devices; pCurr; pCurr = pCurr->next ) for ( hid_device_ref<CHIDDevice> pCurr = g_Devices; pCurr; pCurr = pCurr->next )
{ {
if ( strcmp( pCurr->GetDeviceInfo()->path, path ) == 0 ) if ( strcmp( pCurr->GetDeviceInfo()->path, path ) == 0 )
{ {
if ( pCurr->GetDevice() ) { hid_device *pValue = pCurr->GetDevice();
pCurr->IncrementDeviceRefCount(); if ( pValue )
return pCurr->GetDevice(); {
++pValue->m_nDeviceRefCount;
LOGD("Incrementing device %d (%p), refCount = %d\n", pValue->m_nId, pValue, pValue->m_nDeviceRefCount);
return pValue;
} }
// Hold a shared pointer to the controller for the duration // Hold a shared pointer to the controller for the duration
@ -968,8 +951,8 @@ HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path, int bEx
int HID_API_EXPORT HID_API_CALL hid_write(hid_device *device, const unsigned char *data, size_t length) int HID_API_EXPORT HID_API_CALL hid_write(hid_device *device, const unsigned char *data, size_t length)
{ {
LOGV( "hid_write id=%d length=%u", device->nId, length ); LOGV( "hid_write id=%d length=%u", device->m_nId, length );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice ) if ( pDevice )
{ {
return pDevice->SendOutputReport( data, length ); return pDevice->SendOutputReport( data, length );
@ -980,8 +963,8 @@ int HID_API_EXPORT HID_API_CALL hid_write(hid_device *device, const unsigned ch
// TODO: Implement timeout? // TODO: Implement timeout?
int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *device, unsigned char *data, size_t length, int milliseconds) int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *device, unsigned char *data, size_t length, int milliseconds)
{ {
// LOGV( "hid_read_timeout id=%d length=%u timeout=%d", device->nId, length, milliseconds ); // LOGV( "hid_read_timeout id=%d length=%u timeout=%d", device->m_nId, length, milliseconds );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice ) if ( pDevice )
{ {
return pDevice->GetInput( data, length ); return pDevice->GetInput( data, length );
@ -993,7 +976,7 @@ int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *device, unsigned ch
// TODO: Implement blocking // TODO: Implement blocking
int HID_API_EXPORT HID_API_CALL hid_read(hid_device *device, unsigned char *data, size_t length) int HID_API_EXPORT HID_API_CALL hid_read(hid_device *device, unsigned char *data, size_t length)
{ {
LOGV( "hid_read id=%d length=%u", device->nId, length ); LOGV( "hid_read id=%d length=%u", device->m_nId, length );
return hid_read_timeout( device, data, length, 0 ); return hid_read_timeout( device, data, length, 0 );
} }
@ -1005,8 +988,8 @@ int HID_API_EXPORT HID_API_CALL hid_set_nonblocking(hid_device *device, int non
int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *device, const unsigned char *data, size_t length) int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *device, const unsigned char *data, size_t length)
{ {
LOGV( "hid_send_feature_report id=%d length=%u", device->nId, length ); LOGV( "hid_send_feature_report id=%d length=%u", device->m_nId, length );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice ) if ( pDevice )
{ {
return pDevice->SendFeatureReport( data, length ); return pDevice->SendFeatureReport( data, length );
@ -1018,8 +1001,8 @@ int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *device, cons
// Synchronous operation. Will block until completed. // Synchronous operation. Will block until completed.
int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *device, unsigned char *data, size_t length) int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *device, unsigned char *data, size_t length)
{ {
LOGV( "hid_get_feature_report id=%d length=%u", device->nId, length ); LOGV( "hid_get_feature_report id=%d length=%u", device->m_nId, length );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice ) if ( pDevice )
{ {
return pDevice->GetFeatureReport( data, length ); return pDevice->GetFeatureReport( data, length );
@ -1030,26 +1013,28 @@ int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *device, unsig
void HID_API_EXPORT HID_API_CALL hid_close(hid_device *device) void HID_API_EXPORT HID_API_CALL hid_close(hid_device *device)
{ {
LOGV( "hid_close id=%d", device->nId ); LOGV( "hid_close id=%d", device->m_nId );
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_mutex_guard r( &g_DevicesRefCountMutex );
if ( pDevice ) LOGD("Decrementing device %d (%p), refCount = %d\n", device->m_nId, device, device->m_nDeviceRefCount - 1);
if ( --device->m_nDeviceRefCount == 0 )
{ {
pDevice->DecrementDeviceRefCount(); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice->GetDeviceRefCount() == 0 ) { if ( pDevice )
{
pDevice->Close( true ); pDevice->Close( true );
} }
} else
else {
{ delete device;
// Couldn't find it, it's already closed }
delete device; LOGD("Deleted device %p\n", device);
} }
} }
int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *device, wchar_t *string, size_t maxlen) int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *device, wchar_t *string, size_t maxlen)
{ {
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice ) if ( pDevice )
{ {
wcsncpy( string, pDevice->GetDeviceInfo()->manufacturer_string, maxlen ); wcsncpy( string, pDevice->GetDeviceInfo()->manufacturer_string, maxlen );
@ -1060,7 +1045,7 @@ int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *device, wchar_t
int HID_API_EXPORT_CALL hid_get_product_string(hid_device *device, wchar_t *string, size_t maxlen) int HID_API_EXPORT_CALL hid_get_product_string(hid_device *device, wchar_t *string, size_t maxlen)
{ {
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice ) if ( pDevice )
{ {
wcsncpy( string, pDevice->GetDeviceInfo()->product_string, maxlen ); wcsncpy( string, pDevice->GetDeviceInfo()->product_string, maxlen );
@ -1071,7 +1056,7 @@ int HID_API_EXPORT_CALL hid_get_product_string(hid_device *device, wchar_t *stri
int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *device, wchar_t *string, size_t maxlen) int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *device, wchar_t *string, size_t maxlen)
{ {
hid_device_ref<CHIDDevice> pDevice = FindDevice( device->nId ); hid_device_ref<CHIDDevice> pDevice = FindDevice( device->m_nId );
if ( pDevice ) if ( pDevice )
{ {
wcsncpy( string, pDevice->GetDeviceInfo()->serial_number, maxlen ); wcsncpy( string, pDevice->GetDeviceInfo()->serial_number, maxlen );