diff options
Diffstat (limited to 'src/osx/smc.cpp')
-rw-r--r-- | src/osx/smc.cpp | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/src/osx/smc.cpp b/src/osx/smc.cpp index 2482ae3..54fa422 100644 --- a/src/osx/smc.cpp +++ b/src/osx/smc.cpp @@ -50,27 +50,39 @@ namespace Cpu { IOServiceClose(conn); } + long long SMCConnection::getSMCTemp(char *key) { + SMCVal_t val; + kern_return_t result; + result = SMCReadKey(key, &val); + if (result == kIOReturnSuccess) { + if (val.dataSize > 0) { + if (strcmp(val.dataType, DATATYPE_SP78) == 0) { + // convert sp78 value to temperature + int intValue = val.bytes[0] * 256 + (unsigned char)val.bytes[1]; + return static_cast<long long>(intValue / 256.0); + } + } + } + return -1; + } + // core means physical core in SMC, while in core map it's cpu threads :-/ Only an issue on hackintosh? // this means we can only get the T per physical core // another issue with the SMC API is that the key is always 4 chars -> what with systems with more than 9 physical cores? // no Mac models with more than 18 threads are released, so no problem so far // according to VirtualSMC docs (hackintosh fake SMC) the enumeration follows with alphabetic chars - not implemented yet here (nor in VirtualSMC) long long SMCConnection::getTemp(int core) { - SMCVal_t val; - kern_return_t result; char key[] = SMC_KEY_CPU_TEMP; if (core >= 0) { snprintf(key, 5, "TC%1dc", core); } - result = SMCReadKey(key, &val); - if (result == kIOReturnSuccess) { - if (strcmp(val.dataType, DATATYPE_SP78) == 0) { - // convert sp78 value to temperature - int intValue = val.bytes[0] * 256 + (unsigned char)val.bytes[1]; - return static_cast<long long>(intValue / 256.0); - } + long long result = getSMCTemp(key); + if (result == -1) { + // try again with C + snprintf(key, 5, "TC%1dC", core); + result = getSMCTemp(key); } - return -1; + return result; } kern_return_t SMCConnection::SMCReadKey(UInt32Char_t key, SMCVal_t *val) { |