aboutsummaryrefslogtreecommitdiffstats
path: root/src/util
diff options
context:
space:
mode:
Diffstat (limited to 'src/util')
-rw-r--r--src/util/Makefile.sources2
-rw-r--r--src/util/meson.build2
-rw-r--r--src/util/os_time.c191
-rw-r--r--src/util/os_time.h130
4 files changed, 325 insertions, 0 deletions
diff --git a/src/util/Makefile.sources b/src/util/Makefile.sources
index f8096feb232..104ecae8ed3 100644
--- a/src/util/Makefile.sources
+++ b/src/util/Makefile.sources
@@ -22,6 +22,8 @@ MESA_UTIL_FILES := \
macros.h \
mesa-sha1.c \
mesa-sha1.h \
+ os_time.c \
+ os_time.h \
sha1/sha1.c \
sha1/sha1.h \
ralloc.c \
diff --git a/src/util/meson.build b/src/util/meson.build
index a9ab5bf545c..ac86c9e111e 100644
--- a/src/util/meson.build
+++ b/src/util/meson.build
@@ -46,6 +46,8 @@ files_mesa_util = files(
'macros.h',
'mesa-sha1.c',
'mesa-sha1.h',
+ 'os_time.c',
+ 'os_time.h',
'sha1/sha1.c',
'sha1/sha1.h',
'ralloc.c',
diff --git a/src/util/os_time.c b/src/util/os_time.c
new file mode 100644
index 00000000000..8d8291ff173
--- /dev/null
+++ b/src/util/os_time.c
@@ -0,0 +1,191 @@
+/**************************************************************************
+ *
+ * Copyright 2008-2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * OS independent time-manipulation functions.
+ *
+ * @author Jose Fonseca <[email protected]>
+ */
+
+#include "os_time.h"
+
+/* TODO: fix this dependency */
+#include "gallium/include/pipe/p_config.h"
+
+#include "util/u_atomic.h"
+
+#if defined(PIPE_OS_UNIX)
+# include <time.h> /* timeval */
+# include <sys/time.h> /* timeval */
+# include <sched.h> /* sched_yield */
+# include <errno.h>
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
+# include <windows.h>
+#else
+# error Unsupported OS
+#endif
+
+
+int64_t
+os_time_get_nano(void)
+{
+#if defined(PIPE_OS_LINUX)
+
+ struct timespec tv;
+ clock_gettime(CLOCK_MONOTONIC, &tv);
+ return tv.tv_nsec + tv.tv_sec*INT64_C(1000000000);
+
+#elif defined(PIPE_OS_UNIX)
+
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ return tv.tv_usec*INT64_C(1000) + tv.tv_sec*INT64_C(1000000000);
+
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
+
+ static LARGE_INTEGER frequency;
+ LARGE_INTEGER counter;
+ int64_t secs, nanosecs;
+ if(!frequency.QuadPart)
+ QueryPerformanceFrequency(&frequency);
+ QueryPerformanceCounter(&counter);
+ /* Compute seconds and nanoseconds parts separately to
+ * reduce severity of precision loss.
+ */
+ secs = counter.QuadPart / frequency.QuadPart;
+ nanosecs = (counter.QuadPart % frequency.QuadPart) * INT64_C(1000000000)
+ / frequency.QuadPart;
+ return secs*INT64_C(1000000000) + nanosecs;
+
+#else
+
+#error Unsupported OS
+
+#endif
+}
+
+
+
+void
+os_time_sleep(int64_t usecs)
+{
+#if defined(PIPE_OS_LINUX)
+ struct timespec time;
+ time.tv_sec = usecs / 1000000;
+ time.tv_nsec = (usecs % 1000000) * 1000;
+ while (clock_nanosleep(CLOCK_MONOTONIC, 0, &time, &time) == EINTR);
+
+#elif defined(PIPE_OS_UNIX)
+ usleep(usecs);
+
+#elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
+ DWORD dwMilliseconds = (DWORD) ((usecs + 999) / 1000);
+ /* Avoid Sleep(O) as that would cause to sleep for an undetermined duration */
+ if (dwMilliseconds) {
+ Sleep(dwMilliseconds);
+ }
+#else
+# error Unsupported OS
+#endif
+}
+
+
+
+int64_t
+os_time_get_absolute_timeout(uint64_t timeout)
+{
+ int64_t time, abs_timeout;
+
+ /* Also check for the type upper bound. */
+ if (timeout == OS_TIMEOUT_INFINITE || timeout > INT64_MAX)
+ return OS_TIMEOUT_INFINITE;
+
+ time = os_time_get_nano();
+ abs_timeout = time + (int64_t)timeout;
+
+ /* Check for overflow. */
+ if (abs_timeout < time)
+ return OS_TIMEOUT_INFINITE;
+
+ return abs_timeout;
+}
+
+
+bool
+os_wait_until_zero(volatile int *var, uint64_t timeout)
+{
+ if (!p_atomic_read(var))
+ return true;
+
+ if (!timeout)
+ return false;
+
+ if (timeout == OS_TIMEOUT_INFINITE) {
+ while (p_atomic_read(var)) {
+#if defined(PIPE_OS_UNIX)
+ sched_yield();
+#endif
+ }
+ return true;
+ }
+ else {
+ int64_t start_time = os_time_get_nano();
+ int64_t end_time = start_time + timeout;
+
+ while (p_atomic_read(var)) {
+ if (os_time_timeout(start_time, end_time, os_time_get_nano()))
+ return false;
+
+#if defined(PIPE_OS_UNIX)
+ sched_yield();
+#endif
+ }
+ return true;
+ }
+}
+
+
+bool
+os_wait_until_zero_abs_timeout(volatile int *var, int64_t timeout)
+{
+ if (!p_atomic_read(var))
+ return true;
+
+ if (timeout == OS_TIMEOUT_INFINITE)
+ return os_wait_until_zero(var, OS_TIMEOUT_INFINITE);
+
+ while (p_atomic_read(var)) {
+ if (os_time_get_nano() >= timeout)
+ return false;
+
+#if defined(PIPE_OS_UNIX)
+ sched_yield();
+#endif
+ }
+ return true;
+}
diff --git a/src/util/os_time.h b/src/util/os_time.h
new file mode 100644
index 00000000000..049ab118db2
--- /dev/null
+++ b/src/util/os_time.h
@@ -0,0 +1,130 @@
+/**************************************************************************
+ *
+ * Copyright 2008-2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * OS independent time-manipulation functions.
+ *
+ * @author Jose Fonseca <[email protected]>
+ */
+
+#ifndef _OS_TIME_H_
+#define _OS_TIME_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* must be equal to PIPE_TIMEOUT_INFINITE */
+#define OS_TIMEOUT_INFINITE 0xffffffffffffffffull
+
+/*
+ * Get the current time in nanoseconds from an unknown base.
+ */
+int64_t
+os_time_get_nano(void);
+
+
+/*
+ * Get the current time in microseconds from an unknown base.
+ */
+static inline int64_t
+os_time_get(void)
+{
+ return os_time_get_nano() / 1000;
+}
+
+
+/*
+ * Sleep.
+ */
+void
+os_time_sleep(int64_t usecs);
+
+
+/*
+ * Helper function for detecting time outs, taking in account overflow.
+ *
+ * Returns true if the current time has elapsed beyond the specified interval.
+ */
+static inline bool
+os_time_timeout(int64_t start,
+ int64_t end,
+ int64_t curr)
+{
+ if (start <= end)
+ return !(start <= curr && curr < end);
+ else
+ return !((start <= curr) || (curr < end));
+}
+
+
+/**
+ * Convert a relative timeout in nanoseconds into an absolute timeout,
+ * in other words, it returns current time + timeout.
+ * os_time_get_nano() must be monotonic.
+ * OS_TIMEOUT_INFINITE is passed through unchanged. If the calculation
+ * overflows, OS_TIMEOUT_INFINITE is returned.
+ */
+int64_t
+os_time_get_absolute_timeout(uint64_t timeout);
+
+
+/**
+ * Wait until the variable at the given memory location is zero.
+ *
+ * \param var variable
+ * \param timeout timeout in ns, can be anything from 0 (no wait) to
+ * OS_TIMEOUT_INFINITE (wait forever)
+ * \return true if the variable is zero
+ */
+bool
+os_wait_until_zero(volatile int *var, uint64_t timeout);
+
+
+/**
+ * Wait until the variable at the given memory location is zero.
+ * The timeout is the absolute time when the waiting should stop. If it is
+ * less than or equal to the current time, it only returns the status and
+ * doesn't wait. OS_TIMEOUT_INFINITE waits forever. This requires that
+ * os_time_get_nano is monotonic.
+ *
+ * \param var variable
+ * \param timeout the time in ns when the waiting should stop
+ * \return true if the variable is zero
+ */
+bool
+os_wait_until_zero_abs_timeout(volatile int *var, int64_t timeout);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _OS_TIME_H_ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 00:55:11 +0000