The open source OpenXR runtime
u/logging: Add function to log to file
Part-of: <https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2619>
authored by
Jakob Bornecrantz
and committed by
Marge Bot
3292394c
44773f80
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src/xrt/auxiliary/util/u_logging.c
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src/xrt/auxiliary/util/u_logging.c
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// Copyright 2019-2025, Collabora, Ltd.
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// Copyright 2025, NVIDIA CORPORATION.
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// SPDX-License-Identifier: BSL-1.0
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/*!
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* @file
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u_log_get_global_level(void)
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{
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return debug_get_log_option_global_log();
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}
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/*
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*
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* Logging file code.
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*
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*/
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static FILE *g_log_file = NULL;
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void
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u_log_set_output_file(const char *filename)
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{
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// While not thread safe, this function is externally synchronized.
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if (g_log_file != NULL) {
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FILE *tmp = g_log_file;
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g_log_file = NULL;
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fflush(tmp);
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fclose(tmp);
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tmp = NULL;
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}
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if (filename == NULL) {
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return; // Turning off file logging.
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}
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g_log_file = fopen(filename, "w");
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if (g_log_file == NULL) {
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U_LOG_E("Failed to open '%s'", filename);
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}
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}
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int ret = 0;
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#ifdef XRT_FEATURE_COLOR_LOG
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if (isatty(STDERR_FILENO)) {
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if (g_log_file == NULL && isatty(STDERR_FILENO)) {
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ret = print_prefix_color(func, level, buf, remaining);
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} else {
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ret = print_prefix_mono(func, level, buf, remaining);
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OutputDebugStringA(storage);
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#endif
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fwrite(storage, printed, 1, stderr);
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FILE *output = g_log_file != NULL ? g_log_file : stderr;
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fwrite(storage, printed, 1, output);
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#else
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#error "Port needed for logging function"
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src/xrt/auxiliary/util/u_logging.h
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src/xrt/auxiliary/util/u_logging.h
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// Copyright 2020-2025, Collabora, Ltd.
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// Copyright 2025, NVIDIA CORPORATION.
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// SPDX-License-Identifier: BSL-1.0
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/*!
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* @file
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*/
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enum u_logging_level
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u_log_get_global_level(void);
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/*!
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* Sets the output file for the logging instead of stderr, this function is
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* externally synchronized with ALL other logging functions. Which means do not
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* call any other logging function from different threads during a call to this
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* function. Also to avoid leaks call this function with NULL to close the
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* internally managed FILE object.
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*
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* WANRING THIS FUNCTION IS EXTERNALLY SYNCHRONIZED WITH ALL OTHER FUNCTIONS.
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*/
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void
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u_log_set_output_file(const char *filename);
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/*!
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* @brief Main non-device-related log implementation function: do not call directly, use a macro that wraps it.