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linux,darwin: introduce battery info API
Refs: #4172 Signed-off-by: Juan José Arboleda <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| /* Copyright libuv project contributors. 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS 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. | ||
| */ | ||
|
|
||
| #include "uv.h" | ||
|
|
||
| #if defined(__APPLE__) || TARGET_OS_IPHONE | ||
| #include <dlfcn.h> | ||
| #include "darwin-stub.h" | ||
| #endif /* defined(__APPLE__) || TARGET_OS_IPHONE */ | ||
|
|
||
| /* macOS won't need any of this */ | ||
| #if defined(__linux__) | ||
| #include <stdlib.h> | ||
| #include "internal.h" | ||
| #endif | ||
|
|
||
| int uv_battery_info(uv_battery_info_t* info) { | ||
| int err; | ||
| err = UV_ENOSYS; | ||
| #if defined(__APPLE__) || TARGET_OS_IPHONE | ||
| CFTypeRef (*pIOPSCopyPowerSourcesInfo)(void); | ||
| CFArrayRef (*pIOPSCopyPowerSourcesList)(CFTypeRef); | ||
| CFIndex (*pCFArrayGetCount)(CFArrayRef); | ||
| CFArrayRef (*pIOPSGetPowerSourceDescription)(CFTypeRef, CFTypeRef); | ||
| void (*pCFRelease)(CFTypeRef); | ||
| void (*pCFNumberGetValue)(CFNumberRef, int, void *); | ||
| void* (*pCFArrayGetValueAtIndex)(CFArrayRef, CFIndex); | ||
| void* (*pCFDictionaryGetValue)(CFDictionaryRef, const void*); | ||
| int (*pCFBooleanGetValue)(CFBooleanRef); | ||
| CFStringRef (*pCFStringCreateWithCString)(CFAllocatorRef, | ||
| const char*, | ||
| CFStringEncoding); | ||
|
|
||
| CFBooleanRef is_charging_value; | ||
| CFDictionaryRef power_source; | ||
| CFNumberRef current_capacity; | ||
| CFNumberRef time_remaining; | ||
| CFArrayRef sources = NULL; | ||
| CFTypeRef blob = NULL; | ||
| int h = 0; | ||
| int is_charging = 0; | ||
| void* core_foundation_handle; | ||
| void* iokit_framekwork_handle; | ||
|
|
||
| err = UV_ENOENT; | ||
| iokit_framekwork_handle = dlopen("/System/Library/Frameworks/" | ||
| "IOKit.framework/IOKit", | ||
| RTLD_LAZY | RTLD_LOCAL); | ||
|
|
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| core_foundation_handle = dlopen("/System/Library/Frameworks/" | ||
| "CoreFoundation.framework/CoreFoundation", | ||
| RTLD_LAZY | RTLD_LOCAL); | ||
|
|
||
| if (iokit_framekwork_handle == NULL || core_foundation_handle == NULL) | ||
| goto out; | ||
|
|
||
| *(void **)(&pCFRelease) = dlsym(core_foundation_handle, "CFRelease"); | ||
| *(void **)(&pCFStringCreateWithCString) = | ||
| dlsym(core_foundation_handle, "CFStringCreateWithCString"); | ||
| *(void **)(&pCFArrayGetCount) = | ||
| dlsym(core_foundation_handle, "CFArrayGetCount"); | ||
| *(void **)(&pCFArrayGetValueAtIndex) = | ||
| dlsym(core_foundation_handle, "CFArrayGetValueAtIndex"); | ||
| *(void **)(&pCFNumberGetValue) = | ||
| dlsym(core_foundation_handle, "CFNumberGetValue"); | ||
| *(void **)(&pCFBooleanGetValue) = | ||
| dlsym(core_foundation_handle, "CFBooleanGetValue"); | ||
| *(void **)(&pCFDictionaryGetValue) = | ||
| dlsym(core_foundation_handle, "CFDictionaryGetValue"); | ||
| *(void **)(&pIOPSCopyPowerSourcesInfo) = | ||
| dlsym(iokit_framekwork_handle, "IOPSCopyPowerSourcesInfo"); | ||
| *(void **)(&pIOPSCopyPowerSourcesList) = | ||
| dlsym(iokit_framekwork_handle, "IOPSCopyPowerSourcesList"); | ||
| *(void **)(&pIOPSGetPowerSourceDescription) = | ||
| dlsym(iokit_framekwork_handle, "IOPSGetPowerSourceDescription"); | ||
|
|
||
| if (pCFRelease == NULL || | ||
| pCFStringCreateWithCString == NULL || | ||
| pCFArrayGetCount == NULL || | ||
| pCFArrayGetValueAtIndex == NULL || | ||
| pCFNumberGetValue == NULL || | ||
| pCFDictionaryGetValue == NULL || | ||
| pIOPSCopyPowerSourcesInfo == NULL || | ||
| pIOPSCopyPowerSourcesList == NULL || | ||
| pIOPSGetPowerSourceDescription == NULL) { | ||
| goto out; | ||
| } | ||
|
|
||
| #define S(s) pCFStringCreateWithCString(NULL, (s), kCFStringEncodingUTF8) | ||
|
|
||
| blob = pIOPSCopyPowerSourcesInfo(); | ||
| if (blob == NULL) | ||
| goto out; | ||
|
|
||
| sources = pIOPSCopyPowerSourcesList(blob); | ||
| if (sources == NULL) | ||
| goto out; | ||
|
|
||
| /* If there are no sources, we're on a desktop or server, nothing to do */ | ||
| if (pCFArrayGetCount(sources) == 0) { | ||
| err = UV_ENOSYS; | ||
| goto out; | ||
| } | ||
|
|
||
| power_source = | ||
| pIOPSGetPowerSourceDescription(blob, pCFArrayGetValueAtIndex(sources, 0)); | ||
| if (power_source == NULL) | ||
| goto out; | ||
|
|
||
| err = 0; | ||
|
|
||
| /* kIOPSCurrentCapacityKey */ | ||
| current_capacity = pCFDictionaryGetValue(power_source, S("Current Capacity")); | ||
| if (current_capacity != NULL) { | ||
| pCFNumberGetValue(current_capacity, pkCFNumberIntType, &h); | ||
| info->level = h; | ||
| } | ||
|
|
||
| /* Retrieve is_charging status kIOPSIsChargingKey */ | ||
| is_charging_value = pCFDictionaryGetValue(power_source, S("Is Charging")); | ||
| if (is_charging_value != NULL) { | ||
| is_charging = pCFBooleanGetValue(is_charging_value); | ||
| info->is_charging = is_charging; | ||
| } | ||
|
|
||
| /* kIOPSTimeToFullChargeKey and kIOPSTimeToEmptyKey */ | ||
| time_remaining = | ||
| pCFDictionaryGetValue(power_source, | ||
| is_charging ? S("Time to Full Charge") : S("Time to Empty")); | ||
| if (time_remaining != NULL) { | ||
| pCFNumberGetValue(time_remaining, pkCFNumberIntType, &h); | ||
| } | ||
|
|
||
| /* A value of -1 indicates "Still Calculating the Time" */ | ||
| if (h == -1) | ||
| h = 0; | ||
|
|
||
| /* Default unit is minutes, convert to seconds */ | ||
| h = h * 60; | ||
| if (is_charging == 1) { | ||
| info->charge_time_in_secs = h; | ||
| info->discharge_time_in_secs = 0; | ||
| } else { | ||
| info->discharge_time_in_secs = h; | ||
| info->charge_time_in_secs = 0; | ||
| } | ||
|
|
||
| out: | ||
| if (iokit_framekwork_handle != NULL) | ||
| dlclose(iokit_framekwork_handle); | ||
|
|
||
| if (core_foundation_handle != NULL) | ||
| dlclose(core_foundation_handle); | ||
|
|
||
| if (blob != NULL) | ||
| pCFRelease(blob); | ||
|
|
||
| if (sources != NULL) | ||
| pCFRelease(sources); | ||
|
|
||
| #elif defined(__linux__) | ||
| char buf[1024]; | ||
| char path[1024]; | ||
| int r; | ||
| int i; | ||
| int battery_count; | ||
| double energy_full; | ||
| double energy_now; | ||
| double power_now; | ||
| struct stat statbuf; | ||
|
|
||
| battery_count = 0; | ||
|
|
||
| // Iterate over all the supported batteries | ||
| for (i = 0; i <= 3; i++) { | ||
| snprintf(path, sizeof(path), "/sys/class/power_supply/BAT%d", i); | ||
| r = uv__stat(path, &statbuf); | ||
| // The battery doesn't exist, continue | ||
| if (r < 0) | ||
| continue; | ||
|
|
||
| snprintf(path, sizeof(path), "/sys/class/power_supply/BAT%d/power_now", i); | ||
| r = uv__slurp(path, buf, sizeof(buf)); | ||
| if (r != 0) | ||
| goto out; | ||
|
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| power_now = atof(buf); | ||
|
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| snprintf(path, sizeof(path), "/sys/class/power_supply/BAT%d/energy_now", i); | ||
| r = uv__slurp(path, buf, sizeof(buf)); | ||
| if (r != 0) | ||
| goto out; | ||
|
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| energy_now = atof(buf); | ||
|
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| snprintf(path, sizeof(path), "/sys/class/power_supply/BAT%d/status", i); | ||
| r = uv__slurp(path, buf, sizeof(buf)); | ||
| if (r != 0) | ||
| goto out; | ||
|
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| if (strstr(buf, "Charging") != NULL) { | ||
| info->is_charging = 1; | ||
| snprintf(path, sizeof(path), "/sys/class/power_supply/BAT%d/energy_full", i); | ||
| r = uv__slurp(path, buf, sizeof(buf)); | ||
| if (r != 0) | ||
| goto out; | ||
|
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| energy_full = atof(buf); | ||
|
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| info->charge_time_in_secs = ((energy_full - energy_now) / power_now) * 3600; | ||
| info->discharge_time_in_secs = 0; | ||
| } else if (strstr(buf, "Discharging") != NULL) { | ||
| info->is_charging = 0; | ||
| info->charge_time_in_secs = 0; | ||
| info->discharge_time_in_secs = (energy_now / power_now) * 3600; | ||
| } | ||
|
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| snprintf(path, sizeof(path), "/sys/class/power_supply/BAT%d/capacity", i); | ||
| r = uv__slurp(path, buf, sizeof(buf)); | ||
| if (r != 0) | ||
| goto out; | ||
|
|
||
| info->level = atoi(buf); | ||
| battery_count++; | ||
| } | ||
|
|
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| if (battery_count == 0) { | ||
| err = UV_ENOSYS; | ||
| goto out2; | ||
| } | ||
|
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| // info->charge_time_in_secs /= battery_count; | ||
| // info->discharge_time_in_secs /= battery_count; | ||
|
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| err = 0; | ||
| out: | ||
| /* In case of error, fill with 0 (sum for merge results later) */ | ||
| // info->charge_time_in_secs = 0; | ||
| // info->discharge_time_in_secs = 0; | ||
| // info->is_charging = 0; | ||
| // info->level = 0; | ||
|
|
||
| /* In case of no batteries, leave struct untouched */ | ||
| out2: | ||
| #endif /* defined(__APPLE__) || TARGET_OS_IPHONE */ | ||
| return err; | ||
| } |
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