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C:/Program Files/dotnet/shared/Microsoft.NETCore.App/5.0.17/_[ Not.Writable ]

File:C:/Program Files/dotnet/shared/Microsoft.NETCore.App/5.0.17/hostfxr.h

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

#ifndef __HOSTFXR_H__
#define __HOSTFXR_H__

#include <stddef.h>
#include <stdint.h>

#if defined(_WIN32)
    #define HOSTFXR_CALLTYPE __cdecl
    #ifdef _WCHAR_T_DEFINED
        typedef wchar_t char_t;
    #else
        typedef unsigned short char_t;
    #endif
#else
    #define HOSTFXR_CALLTYPE
    typedef char char_t;
#endif

enum hostfxr_delegate_type
{
    hdt_com_activation,
    hdt_load_in_memory_assembly,
    hdt_winrt_activation,
    hdt_com_register,
    hdt_com_unregister,
    hdt_load_assembly_and_get_function_pointer,
    hdt_get_function_pointer,
};

typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_main_fn)(const int argc, const char_t **argv);
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_main_startupinfo_fn)(
    const int argc,
    const char_t **argv,
    const char_t *host_path,
    const char_t *dotnet_root,
    const char_t *app_path);
typedef int32_t(HOSTFXR_CALLTYPE* hostfxr_main_bundle_startupinfo_fn)(
    const int argc,
    const char_t** argv,
    const char_t* host_path,
    const char_t* dotnet_root,
    const char_t* app_path,
    int64_t bundle_header_offset);

typedef void(HOSTFXR_CALLTYPE *hostfxr_error_writer_fn)(const char_t *message);

//
// Sets a callback which is to be used to write errors to.
//
// Parameters:
//     error_writer
//         A callback function which will be invoked every time an error is to be reported.
//         Or nullptr to unregister previously registered callback and return to the default behavior.
// Return value:
//     The previously registered callback (which is now unregistered), or nullptr if no previous callback
//     was registered
//
// The error writer is registered per-thread, so the registration is thread-local. On each thread
// only one callback can be registered. Subsequent registrations overwrite the previous ones.
//
// By default no callback is registered in which case the errors are written to stderr.
//
// Each call to the error writer is sort of like writing a single line (the EOL character is omitted).
// Multiple calls to the error writer may occure for one failure.
//
// If the hostfxr invokes functions in hostpolicy as part of its operation, the error writer
// will be propagated to hostpolicy for the duration of the call. This means that errors from
// both hostfxr and hostpolicy will be reporter through the same error writer.
//
typedef hostfxr_error_writer_fn(HOSTFXR_CALLTYPE *hostfxr_set_error_writer_fn)(hostfxr_error_writer_fn error_writer);

typedef void* hostfxr_handle;
struct hostfxr_initialize_parameters
{
    size_t size;
    const char_t *host_path;
    const char_t *dotnet_root;
};

//
// Initializes the hosting components for a dotnet command line running an application
//
// Parameters:
//    argc
//      Number of argv arguments
//    argv
//      Command-line arguments for running an application (as if through the dotnet executable).
//    parameters
//      Optional. Additional parameters for initialization
//    host_context_handle
//      On success, this will be populated with an opaque value representing the initialized host context
//
// Return value:
//    Success          - Hosting components were successfully initialized
//    HostInvalidState - Hosting components are already initialized
//
// This function parses the specified command-line arguments to determine the application to run. It will
// then find the corresponding .runtimeconfig.json and .deps.json with which to resolve frameworks and
// dependencies and prepare everything needed to load the runtime.
//
// This function only supports arguments for running an application. It does not support SDK commands.
//
// This function does not load the runtime.
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_initialize_for_dotnet_command_line_fn)(
    int argc,
    const char_t **argv,
    const struct hostfxr_initialize_parameters *parameters,
    /*out*/ hostfxr_handle *host_context_handle);

//
// Initializes the hosting components using a .runtimeconfig.json file
//
// Parameters:
//    runtime_config_path
//      Path to the .runtimeconfig.json file
//    parameters
//      Optional. Additional parameters for initialization
//    host_context_handle
//      On success, this will be populated with an opaque value representing the initialized host context
//
// Return value:
//    Success                            - Hosting components were successfully initialized
//    Success_HostAlreadyInitialized     - Config is compatible with already initialized hosting components
//    Success_DifferentRuntimeProperties - Config has runtime properties that differ from already initialized hosting components
//    CoreHostIncompatibleConfig         - Config is incompatible with already initialized hosting components
//
// This function will process the .runtimeconfig.json to resolve frameworks and prepare everything needed
// to load the runtime. It will only process the .deps.json from frameworks (not any app/component that
// may be next to the .runtimeconfig.json).
//
// This function does not load the runtime.
//
// If called when the runtime has already been loaded, this function will check if the specified runtime
// config is compatible with the existing runtime.
//
// Both Success_HostAlreadyInitialized and Success_DifferentRuntimeProperties codes are considered successful
// initializations. In the case of Success_DifferentRuntimeProperties, it is left to the consumer to verify that
// the difference in properties is acceptable.
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_initialize_for_runtime_config_fn)(
    const char_t *runtime_config_path,
    const struct hostfxr_initialize_parameters *parameters,
    /*out*/ hostfxr_handle *host_context_handle);

//
// Gets the runtime property value for an initialized host context
//
// Parameters:
//     host_context_handle
//       Handle to the initialized host context
//     name
//       Runtime property name
//     value
//       Out parameter. Pointer to a buffer with the property value.
//
// Return value:
//     The error code result.
//
// The buffer pointed to by value is owned by the host context. The lifetime of the buffer is only
// guaranteed until any of the below occur:
//   - a 'run' method is called for the host context
//   - properties are changed via hostfxr_set_runtime_property_value
//   - the host context is closed via 'hostfxr_close'
//
// If host_context_handle is nullptr and an active host context exists, this function will get the
// property value for the active host context.
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_get_runtime_property_value_fn)(
    const hostfxr_handle host_context_handle,
    const char_t *name,
    /*out*/ const char_t **value);

//
// Sets the value of a runtime property for an initialized host context
//
// Parameters:
//     host_context_handle
//       Handle to the initialized host context
//     name
//       Runtime property name
//     value
//       Value to set
//
// Return value:
//     The error code result.
//
// Setting properties is only supported for the first host context, before the runtime has been loaded.
//
// If the property already exists in the host context, it will be overwritten. If value is nullptr, the
// property will be removed.
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_set_runtime_property_value_fn)(
    const hostfxr_handle host_context_handle,
    const char_t *name,
    const char_t *value);

//
// Gets all the runtime properties for an initialized host context
//
// Parameters:
//     host_context_handle
//       Handle to the initialized host context
//     count
//       [in] Size of the keys and values buffers
//       [out] Number of properties returned (size of keys/values buffers used). If the input value is too
//             small or keys/values is nullptr, this is populated with the number of available properties
//     keys
//       Array of pointers to buffers with runtime property keys
//     values
//       Array of pointers to buffers with runtime property values
//
// Return value:
//     The error code result.
//
// The buffers pointed to by keys and values are owned by the host context. The lifetime of the buffers is only
// guaranteed until any of the below occur:
//   - a 'run' method is called for the host context
//   - properties are changed via hostfxr_set_runtime_property_value
//   - the host context is closed via 'hostfxr_close'
//
// If host_context_handle is nullptr and an active host context exists, this function will get the
// properties for the active host context.
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_get_runtime_properties_fn)(
    const hostfxr_handle host_context_handle,
    /*inout*/ size_t * count,
    /*out*/ const char_t **keys,
    /*out*/ const char_t **values);

//
// Load CoreCLR and run the application for an initialized host context
//
// Parameters:
//     host_context_handle
//       Handle to the initialized host context
//
// Return value:
//     If the app was successfully run, the exit code of the application. Otherwise, the error code result.
//
// The host_context_handle must have been initialized using hostfxr_initialize_for_dotnet_command_line.
//
// This function will not return until the managed application exits.
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_run_app_fn)(const hostfxr_handle host_context_handle);

//
// Gets a typed delegate from the currently loaded CoreCLR or from a newly created one.
//
// Parameters:
//     host_context_handle
//       Handle to the initialized host context
//     type
//       Type of runtime delegate requested
//     delegate
//       An out parameter that will be assigned the delegate.
//
// Return value:
//     The error code result.
//
// If the host_context_handle was initialized using hostfxr_initialize_for_runtime_config,
// then all delegate types are supported.
// If the host_context_handle was initialized using hostfxr_initialize_for_dotnet_command_line,
// then only the following delegate types are currently supported:
//     hdt_load_assembly_and_get_function_pointer
//     hdt_get_function_pointer
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_get_runtime_delegate_fn)(
    const hostfxr_handle host_context_handle,
    enum hostfxr_delegate_type type,
    /*out*/ void **delegate);

//
// Closes an initialized host context
//
// Parameters:
//     host_context_handle
//       Handle to the initialized host context
//
// Return value:
//     The error code result.
//
typedef int32_t(HOSTFXR_CALLTYPE *hostfxr_close_fn)(const hostfxr_handle host_context_handle);

#endif //__HOSTFXR_H__

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