use C10_API in libc10.so (pytorch#94171)

MSVC emits several C4273 warning  when compiling c10. I think the offending files should use C10_API instead of TORCH_API. If the tests pass, the changes should be safe.

Pull Request resolved: pytorch#94171
Approved by: https://github.com/Skylion007

c10/core/GeneratorImpl.h

@@ -98,7 +98,7 @@ struct C10_API GeneratorImpl : public c10::intrusive_ptr_target {
 
 namespace detail {
 
-TORCH_API uint64_t getNonDeterministicRandom(bool is_cuda = false);
+C10_API uint64_t getNonDeterministicRandom(bool is_cuda = false);
 
 } // namespace detail
 

c10/core/GradMode.h

@@ -5,14 +5,14 @@
 
 namespace c10 {
 
-struct TORCH_API GradMode {
+struct C10_API GradMode {
   static bool is_enabled();
   static void set_enabled(bool enabled);
 };
 
 // A RAII, thread local (!) guard that enables or disables grad mode upon
 // construction, and sets it back to the original value upon destruction.
-struct TORCH_API AutoGradMode {
+struct C10_API AutoGradMode {
   AutoGradMode(bool enabled) : prev_mode(GradMode::is_enabled()) {
     GradMode::set_enabled(enabled);
   }
@@ -24,13 +24,13 @@ struct TORCH_API AutoGradMode {
 
 // A RAII, thread local (!) guard that stops future operations from building
 // gradients.
-struct TORCH_API NoGradGuard : public AutoGradMode {
+struct C10_API NoGradGuard : public AutoGradMode {
   NoGradGuard() : AutoGradMode(/*enabled=*/false) {}
 };
 
 // A RAII, thread local (!) guard that enables or disables forward grad mode
 // upon construction, and sets it back to the original value upon destruction.
-struct TORCH_API AutoFwGradMode {
+struct C10_API AutoFwGradMode {
   AutoFwGradMode(bool enabled)
       : prev_mode(AutogradState::get_tls_state().get_fw_grad_mode()) {
     AutogradState::get_tls_state().set_fw_grad_mode(enabled);

c10/core/InferenceMode.h

@@ -9,7 +9,7 @@ namespace c10 {
 
 // A RAII, thread local (!) guard that enables or disables inference mode upon
 // construction, and sets it back to the original value upon destruction.
-struct TORCH_API InferenceMode {
+struct C10_API InferenceMode {
   // Note [Expected TLS state in InferenceMode]:
   //   InferenceMode: ADInplaceOrView not in
   //   raw_local_dispatch_key_set.included(),

c10/cuda/CUDAStream.h

@@ -203,7 +203,7 @@ class C10_CUDA_API CUDAStream {
  * isHighPriority to true, or a stream for a specific device by setting device
  * (defaulting to the current CUDA stream.)
  */
-TORCH_API CUDAStream
+C10_API CUDAStream
 getStreamFromPool(const bool isHighPriority = false, DeviceIndex device = -1);
 
 /**
@@ -213,7 +213,7 @@ getStreamFromPool(const bool isHighPriority = false, DeviceIndex device = -1);
  * want to operate on a non-torch allocated stream for data exchange or similar
  * purposes
  */
-TORCH_API CUDAStream
+C10_API CUDAStream
 getStreamFromExternal(cudaStream_t ext_stream, DeviceIndex device_index);
 
 /**
@@ -222,7 +222,7 @@ getStreamFromExternal(cudaStream_t ext_stream, DeviceIndex device_index);
  * where most computation occurs when you aren't explicitly using
  * streams.
  */
-TORCH_API CUDAStream getDefaultCUDAStream(DeviceIndex device_index = -1);
+C10_API CUDAStream getDefaultCUDAStream(DeviceIndex device_index = -1);
 
 /**
  * Get the current CUDA stream, for the passed CUDA device, or for the
@@ -231,7 +231,7 @@ TORCH_API CUDAStream getDefaultCUDAStream(DeviceIndex device_index = -1);
  * be different if someone called 'setCurrentCUDAStream' or used 'StreamGuard'
  * or 'CUDAStreamGuard'.
  */
-TORCH_API CUDAStream getCurrentCUDAStream(DeviceIndex device_index = -1);
+C10_API CUDAStream getCurrentCUDAStream(DeviceIndex device_index = -1);
 
 /**
  * Set the current stream on the device of the passed in stream to be
@@ -243,7 +243,7 @@ TORCH_API CUDAStream getCurrentCUDAStream(DeviceIndex device_index = -1);
  * (which will switch both your current device and current stream in the way you
  * expect, and reset it back to its original state afterwards).
  */
-TORCH_API void setCurrentCUDAStream(CUDAStream stream);
+C10_API void setCurrentCUDAStream(CUDAStream stream);
 
 C10_API std::ostream& operator<<(std::ostream& stream, const CUDAStream& s);
 

c10/util/UniqueVoidPtr.h

@@ -10,7 +10,7 @@ using DeleterFnPtr = void (*)(void*);
 namespace detail {
 
 // Does not delete anything
-TORCH_API void deleteNothing(void*);
+C10_API void deleteNothing(void*);
 
 // A detail::UniqueVoidPtr is an owning smart pointer like unique_ptr, but
 // with three major differences:

c10/util/complex_math.h

@@ -51,10 +51,10 @@ C10_HOST_DEVICE inline c10::complex<T> log2(const c10::complex<T>& x) {
 #if defined(_LIBCPP_VERSION) || \
     (defined(__GLIBCXX__) && !defined(_GLIBCXX11_USE_C99_COMPLEX))
 namespace _detail {
-TORCH_API c10::complex<float> sqrt(const c10::complex<float>& in);
-TORCH_API c10::complex<double> sqrt(const c10::complex<double>& in);
-TORCH_API c10::complex<float> acos(const c10::complex<float>& in);
-TORCH_API c10::complex<double> acos(const c10::complex<double>& in);
+C10_API c10::complex<float> sqrt(const c10::complex<float>& in);
+C10_API c10::complex<double> sqrt(const c10::complex<double>& in);
+C10_API c10::complex<float> acos(const c10::complex<float>& in);
+C10_API c10::complex<double> acos(const c10::complex<double>& in);
 }; // namespace _detail
 #endif
 

c10/util/signal_handler.h

@@ -20,7 +20,7 @@
 
 namespace c10 {
 
-class TORCH_API SignalHandler {
+class C10_API SignalHandler {
  public:
   enum class Action { NONE, STOP };
 
@@ -40,13 +40,13 @@ class TORCH_API SignalHandler {
 };
 
 #if defined(C10_SUPPORTS_FATAL_SIGNAL_HANDLERS)
-class TORCH_API FatalSignalHandler {
+class C10_API FatalSignalHandler {
   // This works by setting up certain fatal signal handlers. Previous fatal
   // signal handlers will still be called when the signal is raised. Defaults
   // to being off.
  public:
-  TORCH_API void setPrintStackTracesOnFatalSignal(bool print);
-  TORCH_API bool printStackTracesOnFatalSignal();
+  C10_API void setPrintStackTracesOnFatalSignal(bool print);
+  C10_API bool printStackTracesOnFatalSignal();
   static FatalSignalHandler& getInstance();
   virtual ~FatalSignalHandler();