oxr_api_negotiate.c File Reference

File for negotiating with the loader. More...

#include <stdio.h>
#include <string.h>
#include "xrt/xrt_compiler.h"
#include "xrt/xrt_config_os.h"
#include "util/u_debug.h"
#include "oxr_objects.h"
#include "oxr_logger.h"
#include "oxr_api_funcs.h"
#include "oxr_api_verify.h"

Include dependency graph for oxr_api_negotiate.c:

Macros
#define	PRINT_NEGOTIATE(...)
#define	ENTRY(funcName)
	Helper define for generating that GetInstanceProcAddr function. More...
#define	ENTRY_IF(funcName, extraCondition, message)
	Helper define for generating that GetInstanceProcAddr function for conditionally-available functions. More...
#define	ENTRY_IF_EXT(funcName, short_ext_name)    ENTRY_IF(funcName, inst->extensions.short_ext_name, "Required extension XR_" #short_ext_name " not enabled")
	Helper define for generating that GetInstanceProcAddr function for extension-provided functions. More...
#define	ENTRY_IF_VERSION_AT_LEAST(funcName, major, minor)
	Helper define for generating that GetInstanceProcAddr function for functions that have been promoted to core in some OpenXR version. More...

Functions
XRAPI_ATTR XrResult XRAPI_CALL	xrNegotiateLoaderRuntimeInterface (const XrNegotiateLoaderInfo *loaderInfo, XrNegotiateRuntimeRequest *runtimeRequest)
XRAPI_ATTR XrResult XRAPI_CALL	oxr_xrEnumerateApiLayerProperties (uint32_t propertyCapacityInput, uint32_t *propertyCountOutput, XrApiLayerProperties *properties)
	OpenXR API function xrEnumerateApiLayerProperties. More...
static XrResult	handle_non_null (struct oxr_instance *inst, struct oxr_logger *log, const char *name, PFN_xrVoidFunction *out_function)
	Handle a non-null instance pointer. More...
static XrResult	handle_null (struct oxr_logger *log, const char *name, PFN_xrVoidFunction *out_function)
	Special case a null instance pointer. More...
XRAPI_ATTR XrResult XRAPI_CALL	oxr_xrGetInstanceProcAddr (XrInstance instance, const char *name, PFN_xrVoidFunction *function)
	OpenXR API function xrGetInstanceProcAddr. More...

Detailed Description

File for negotiating with the loader.

Author

Rylie Pavlik rylie.nosp@m..pav.nosp@m.lik@c.nosp@m.olla.nosp@m.bora..nosp@m.com

Jakob Bornecrantz jakob.nosp@m.@col.nosp@m.labor.nosp@m.a.co.nosp@m.m

Korcan Hussein korca.nosp@m.n.hu.nosp@m.ssein.nosp@m.@col.nosp@m.labor.nosp@m.a.co.nosp@m.m

Macro Definition Documentation

ENTRY

#define ENTRY

(

funcName

)

Value:

        do {                                                                                                           \
                if (strcmp(name, #funcName) == 0) {                                                                    \
                        PFN_##funcName ret = &oxr_##funcName;                                                          \
                        *out_function = (PFN_xrVoidFunction)(ret);                                                     \
                        return XR_SUCCESS;                                                                             \
                }                                                                                                      \
        } while (false)

Helper define for generating that GetInstanceProcAddr function.

Use for functions that should be unconditionally available.

ENTRY_IF

#define ENTRY_IF	(		funcName,
			extraCondition,
			message
	)

Value:

        do {                                                                                                           \
                if (strcmp(name, #funcName) == 0) {                                                                    \
                        if (extraCondition) {                                                                          \
                                PFN_##funcName ret = &oxr_##funcName;                                                  \
                                *out_function = (PFN_xrVoidFunction)(ret);                                             \
                                return XR_SUCCESS;                                                                     \
                        }                                                                                              \
                        return XR_ERROR_FUNCTION_UNSUPPORTED;                                                          \
                }                                                                                                      \
        } while (false)

Helper define for generating that GetInstanceProcAddr function for conditionally-available functions.

Checks the extra condition to e.g. find out if the extension is enabled

ENTRY_IF_EXT

#define ENTRY_IF_EXT	(		funcName,
			short_ext_name
	)		ENTRY_IF(funcName, inst->extensions.short_ext_name, "Required extension XR_" #short_ext_name " not enabled")

Helper define for generating that GetInstanceProcAddr function for extension-provided functions.

Wraps ENTRY_IF for the common case.

Pass the function name and the (mixed-case) extension name without the leading XR_.

ENTRY_IF_VERSION_AT_LEAST

#define ENTRY_IF_VERSION_AT_LEAST	(		funcName,
			major,
			minor
	)

Value:

        ENTRY_IF(funcName, (inst->openxr_version.major_minor >= XR_MAKE_VERSION(major, minor, 0)),                     \
                 ("OpenXR version must be at least %d.%d.x", major, minor))

Helper define for generating that GetInstanceProcAddr function for functions that have been promoted to core in some OpenXR version.

Wraps ENTRY_IF for the common case.

Pass the function name and the OpenXR version the function has first been available in core.

PRINT_NEGOTIATE

#define PRINT_NEGOTIATE

(

...

)

Value:

        do {                                                                                                           \
                if (debug_get_bool_option_negotiate()) {                                                               \
                        fprintf(stderr, __VA_ARGS__);                                                                  \
                }                                                                                                      \
        } while (false)

Function Documentation

handle_non_null()

static XrResult handle_non_null ( struct oxr_instance *  inst, struct oxr_logger *  log, const char *  name, PFN_xrVoidFunction *  out_function  )

static

Handle a non-null instance pointer.

References ENTRY, ENTRY_IF_EXT, and ENTRY_IF_VERSION_AT_LEAST.

handle_null()

static XrResult handle_null ( struct oxr_logger *  log, const char *  name, PFN_xrVoidFunction *  out_function  )

static

Special case a null instance pointer.

References ENTRY, and oxr_error().