obs-studio/libobs/util/platform-cocoa.m

230 lines
5.9 KiB
Objective-C

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