add support for libcudart.so for CUDA devices (adds Jetson support)

gpu/gpu_info_cudart.h

@@ -0,0 +1,59 @@
+#ifndef __APPLE__
+#ifndef __GPU_INFO_CUDART_H__
+#define __GPU_INFO_CUDART_H__
+#include "gpu_info.h"
+
+// Just enough typedef's to dlopen/dlsym for memory information
+typedef enum cudartReturn_enum {
+  CUDART_SUCCESS = 0,
+  CUDART_UNSUPPORTED = 1,
+  // Other values omitted for now...
+} cudartReturn_t;
+
+typedef enum cudartDeviceAttr_enum {
+  cudartDevAttrComputeCapabilityMajor = 75,
+  cudartDevAttrComputeCapabilityMinor = 76,
+} cudartDeviceAttr_t;
+
+typedef void *cudartDevice_t;  // Opaque is sufficient
+typedef struct cudartMemory_st {
+  size_t total;
+  size_t free;
+  size_t used;
+} cudartMemory_t;
+
+typedef struct cudartDriverVersion {
+  int major;
+  int minor;
+} cudartDriverVersion_t;
+
+typedef struct cudart_handle {
+  void *handle;
+  uint16_t verbose;
+  cudartReturn_t (*cudaSetDevice)(int device);
+  cudartReturn_t (*cudaDeviceSynchronize)(void);
+  cudartReturn_t (*cudaDeviceReset)(void);
+  cudartReturn_t (*cudaMemGetInfo)(size_t *, size_t *);
+  cudartReturn_t (*cudaGetDeviceCount)(int *);
+  cudartReturn_t (*cudaDeviceGetAttribute)(int* value, cudartDeviceAttr_t attr, int device);
+  cudartReturn_t (*cudaDriverGetVersion) (int *driverVersion);
+} cudart_handle_t;
+
+typedef struct cudart_init_resp {
+  char *err;  // If err is non-null handle is invalid
+  cudart_handle_t ch;
+} cudart_init_resp_t;
+
+typedef struct cudart_compute_capability {
+  char *err;
+  int major;
+  int minor;
+} cudart_compute_capability_t;
+
+
+void cudart_init(char *cudart_lib_path, cudart_init_resp_t *resp);
+void cudart_check_vram(cudart_handle_t ch, mem_info_t *resp);
+void cudart_compute_capability(cudart_handle_t th, cudart_compute_capability_t *cc);
+
+#endif  // __GPU_INFO_CUDART_H__
+#endif  // __APPLE__