11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions of source code must retain the above copyright 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions in binary form must reproduce the above copyright 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * the documentation and/or other materials provided with the 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * distribution. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <signal.h> 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <string.h> 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <time.h> 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint __rt_sigtimedwait(const sigset_t *uthese, siginfo_t *uinfo, const struct timespec *uts, size_t sigsetsize); 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* ok, this is really subtle: <asm/signal.h> defines sigset_t differently 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * when you're in the kernel or in the C library. 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * in the kernel, this is an array of 2 32-bit unsigned longs 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * in the C library, this is a single 32-bit unsigned long 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * moreover, the kernel implementation of rt_sigtimedwait doesn't 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * accept anything except kernel-sized signal sets (probably a bug !) 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * we thus need to create a fake kernel sigset !! 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectint sigwait(const sigset_t *set, int *sig) 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int ret; 50abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham#ifdef __mips__ 51abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham /* use a union to get rid of aliasing warnings. On MIPS sigset_t is 128 bits */ 52abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham union { 53abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham sigset_t kernel_sigset; 54abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham sigset_t dummy_sigset; 55abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham } u; 56abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham u.dummy_sigset = *set; 57abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham#else 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* use a union to get rid of aliasing warnings */ 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project union { 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project unsigned long kernel_sigset[2]; 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project sigset_t dummy_sigset; 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } u; 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u.kernel_sigset[0] = *set; 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project u.kernel_sigset[1] = 0; /* no real-time signals supported ? */ 66abd10011a7a6066df76de7acf5eecb2cc870b0c4Raghu Gandham#endif 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (;;) 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project { 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* __rt_sigtimedwait can return EAGAIN or EINTR, we need to loop 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * around them since sigwait is only allowed to return EINVAL 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ret = __rt_sigtimedwait ( &u.dummy_sigset, NULL, NULL, sizeof(u.kernel_sigset)); 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (ret >= 0) 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (errno != EAGAIN && errno != EINTR) 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return errno; 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *sig = ret; 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return 0; 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 84