macos/keepawake.c

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#include <ascii-chat/platform/system.h>
#include <ascii-chat/log/log.h>
#include <ascii-chat/asciichat_errno.h>
#include <IOKit/pwr_mgt/IOPMLib.h>
 
static IOPMAssertionID g_power_assertion = kIOPMNullAssertionID;
 
asciichat_error_t platform_enable_keepawake(void) {
  // macOS: Use IOKit power assertions
  if (g_power_assertion != kIOPMNullAssertionID) {
    log_debug("Keepawake already enabled");
    return ASCIICHAT_OK;
  }
 
  CFStringRef reason = CFSTR("ascii-chat is running");
  IOReturn result = IOPMAssertionCreateWithName(kIOPMAssertionTypePreventSystemSleep, kIOPMAssertionLevelOn, reason,
                                                &g_power_assertion);
 
  if (result != kIOReturnSuccess) {
    return SET_ERRNO(ERROR_PLATFORM_INIT, "Failed to create power assertion (error %d)", result);
  }
 
  log_debug("Keepawake enabled via IOKit (assertion ID: %u)", g_power_assertion);
  return ASCIICHAT_OK;
}
 
void platform_disable_keepawake(void) {
  if (g_power_assertion != kIOPMNullAssertionID) {
    IOPMAssertionRelease(g_power_assertion);
    log_debug("Keepawake disabled (released assertion ID: %u)", g_power_assertion);
    g_power_assertion = kIOPMNullAssertionID;
  }
}