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c9df41c1e2
Typedef pointers are unsafe. If you do: typedef struct bla *bla_t; then you cannot use it as a constant, such as: const bla_t, because that constant will be to the pointer itself rather than to the underlying data. I admit this was a fundamental mistake that must be corrected. All typedefs that were pointer types will now have their pointers removed from the type itself, and the pointers will be used when they are actually used as variables/parameters/returns instead. This does not break ABI though, which is pretty nice.
217 lines
5.5 KiB
Objective-C
217 lines
5.5 KiB
Objective-C
/*
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* Copyright (c) 2013-2014 Ruwen Hahn <palana@stunned.de>
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* Hugh "Jim" Bailey <obs.jim@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "base.h"
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#include "platform.h"
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#include "dstr.h"
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#include <dlfcn.h>
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#include <time.h>
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#include <unistd.h>
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#include <CoreServices/CoreServices.h>
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#include <mach/mach.h>
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#include <mach/mach_time.h>
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#import <Cocoa/Cocoa.h>
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/* clock function selection taken from libc++ */
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static uint64_t ns_time_simple()
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{
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return mach_absolute_time();
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}
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static double ns_time_compute_factor()
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{
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mach_timebase_info_data_t info = {1, 1};
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mach_timebase_info(&info);
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return ((double)info.numer) / info.denom;
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}
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static uint64_t ns_time_full()
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{
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static double factor = 0.;
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if (factor == 0.) factor = ns_time_compute_factor();
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return (uint64_t)(mach_absolute_time() * factor);
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}
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typedef uint64_t (*time_func)();
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static time_func ns_time_select_func()
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{
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mach_timebase_info_data_t info = {1, 1};
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mach_timebase_info(&info);
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if (info.denom == info.numer)
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return ns_time_simple;
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return ns_time_full;
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}
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uint64_t os_gettime_ns(void)
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{
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static time_func f = NULL;
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if (!f) f = ns_time_select_func();
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return f();
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}
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/* gets the location ~/Library/Application Support/[name] */
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char *os_get_config_path(const char *name)
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{
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NSArray *paths = NSSearchPathForDirectoriesInDomains(
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NSApplicationSupportDirectory, NSUserDomainMask, YES);
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if([paths count] == 0)
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bcrash("Could not get home directory (platform-cocoa)");
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NSString *application_support = paths[0];
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NSUInteger len = [application_support
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lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
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char *path_ptr = bmalloc(len+1);
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path_ptr[len] = 0;
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memcpy(path_ptr, [application_support UTF8String], len);
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struct dstr path;
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dstr_init_move_array(&path, path_ptr);
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dstr_cat(&path, "/");
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dstr_cat(&path, name);
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return path.array;
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}
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struct os_cpu_usage_info {
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int64_t last_cpu_time;
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int64_t last_sys_time;
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int core_count;
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};
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static inline void add_time_value(time_value_t *dst, time_value_t *a,
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time_value_t *b)
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{
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dst->microseconds = a->microseconds + b->microseconds;
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dst->seconds = a->seconds + b->seconds;
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if (dst->microseconds >= 1000000) {
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dst->seconds += dst->microseconds / 1000000;
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dst->microseconds %= 1000000;
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}
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}
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static bool get_time_info(int64_t *cpu_time, int64_t *sys_time)
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{
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mach_port_t task = mach_task_self();
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struct task_thread_times_info thread_data;
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struct task_basic_info_64 task_data;
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mach_msg_type_number_t count;
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kern_return_t kern_ret;
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time_value_t cur_time;
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*cpu_time = 0;
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*sys_time = 0;
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count = TASK_THREAD_TIMES_INFO_COUNT;
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kern_ret = task_info(task, TASK_THREAD_TIMES_INFO,
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(task_info_t)&thread_data, &count);
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if (kern_ret != KERN_SUCCESS)
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return false;
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count = TASK_BASIC_INFO_64_COUNT;
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kern_ret = task_info(task, TASK_BASIC_INFO_64,
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(task_info_t)&task_data, &count);
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if (kern_ret != KERN_SUCCESS)
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return false;
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add_time_value(&cur_time, &thread_data.user_time,
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&thread_data.system_time);
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add_time_value(&cur_time, &cur_time, &task_data.user_time);
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add_time_value(&cur_time, &cur_time, &task_data.system_time);
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*cpu_time = os_gettime_ns() / 1000;
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*sys_time = cur_time.seconds * 1000000 + cur_time.microseconds;
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return true;
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}
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os_cpu_usage_info_t *os_cpu_usage_info_start(void)
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{
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struct os_cpu_usage_info *info = bmalloc(sizeof(*info));
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if (!get_time_info(&info->last_cpu_time, &info->last_sys_time)) {
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bfree(info);
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return NULL;
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}
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info->core_count = sysconf(_SC_NPROCESSORS_ONLN);
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return info;
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}
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double os_cpu_usage_info_query(os_cpu_usage_info_t *info)
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{
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int64_t sys_time, cpu_time;
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int64_t sys_time_delta, cpu_time_delta;
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if (!info || !get_time_info(&cpu_time, &sys_time))
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return 0.0;
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sys_time_delta = sys_time - info->last_sys_time;
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cpu_time_delta = cpu_time - info->last_cpu_time;
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if (cpu_time_delta == 0)
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return 0.0;
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info->last_sys_time = sys_time;
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info->last_cpu_time = cpu_time;
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return (double)sys_time_delta * 100.0 / (double)cpu_time_delta /
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(double)info->core_count;
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}
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void os_cpu_usage_info_destroy(os_cpu_usage_info_t *info)
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{
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if (info)
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bfree(info);
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}
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os_performance_token_t *os_request_high_performance(const char *reason)
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{
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@autoreleasepool {
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NSProcessInfo *pi = [NSProcessInfo processInfo];
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SEL sel = @selector(beginActivityWithOptions:reason:);
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if (![pi respondsToSelector:sel])
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return nil;
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//taken from http://stackoverflow.com/a/20100906
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id activity = [pi beginActivityWithOptions:0x00FFFFFF
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reason:@(reason)];
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return CFBridgingRetain(activity);
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}
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}
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void os_end_high_performance(os_performance_token_t *token)
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{
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@autoreleasepool {
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NSProcessInfo *pi = [NSProcessInfo processInfo];
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SEL sel = @selector(beginActivityWithOptions:reason:);
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if (![pi respondsToSelector:sel])
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return;
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[pi endActivity:CFBridgingRelease(token)];
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}
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}
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