From 21e905da755e72be9c6bb4f2241b72e8f8d20fb8 Mon Sep 17 00:00:00 2001
From: Hizenberg <growlingraptor@gmail.com>
Date: Fri, 15 Mar 2024 00:54:24 +0530
Subject: [PATCH] pthread cleanup API

---
 .../.vs/linux-debug/Ubuntu.scan.fgp.copy      |   4 +-
 .../master_slave/.vs/master_slave/v17/.wsuo   | Bin 39424 -> 39424 bytes
 .../.vs/master_slave/v17/Browse.VC.db         | Bin 7766016 -> 7766016 bytes
 .../.vs/master_slave/v17/DocumentLayout.json  |   4 +-
 .../master_slave/.vs/slnx.sqlite              | Bin 131072 -> 131072 bytes
 .../master_slave/master_slave.c               |  36 +++++++++++++++++-
 6 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/ThreadCancellation_async/master_slave/.vs/linux-debug/Ubuntu.scan.fgp.copy b/ThreadCancellation_async/master_slave/.vs/linux-debug/Ubuntu.scan.fgp.copy
index c7f50b9..6f8e487 100644
--- a/ThreadCancellation_async/master_slave/.vs/linux-debug/Ubuntu.scan.fgp.copy
+++ b/ThreadCancellation_async/master_slave/.vs/linux-debug/Ubuntu.scan.fgp.copy
@@ -1,6 +1,6 @@
 1870684405 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\CMakeLists.txt
 190002877 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\CMakePresets.json
 465106864 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\main.c
-1536483663 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\master_slave.c
+180745754 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\master_slave.c
 393795895 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\master_slave.h
-1551962192 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\
+-1338719569 E:\MultiThreading_Part_A\ThreadCancellation_async\master_slave\
diff --git a/ThreadCancellation_async/master_slave/.vs/master_slave/v17/.wsuo b/ThreadCancellation_async/master_slave/.vs/master_slave/v17/.wsuo
index b85139e456418afa9fbb393ce22e12d978c155ac..6a9c449afd41a91f0f532dc273fb1514f56e7cff 100644
GIT binary patch
delta 428
zcmZqJ!ql*ZX+tg(i;4=j>*hkH)r_373=9nafk1xpK^E!B4lEj?GEfmYAT0>QoItFw
zxt8SvBTJIgJ?G7ZY=;>YM1X=^Kr95rAnhRV4~Y4Jd|@Eo9Kw;$%FD=$Bt7|}j>_gQ
zyyv-i8Q6isAQM2kAi@#>j65KxNFa-rNL^s!0XcyKMO5|*6Ne^>h(ZtRB&`!1Qpkc|
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I!Y)mI0Ls0h7ytkO

delta 405
zcmZqJ!ql*ZX+tg(i$=vtwatZ0s~I`v7#JA-1A)xsgDldM9auC(WuYPpKw2J%1%a4z
zb1lmUMwa;RD}dVA4l^nU0|mK&SOkbc+ChLH$QA<Pe?a!;5RQCSUItAhC6h0zt8D(l
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zOE`Fu<-R!aux>JNVdDW=4l)a2x>*nNBn1x+n4=+9D)cZ;k`US~WM#(4fo5$F(<VC=
zCa@Je$Oe6J+H1_szyPvV5{O+kC&nl;PQF|Ij8So-qVVSH6&LtLf#Pt0Q(>1TKLGuL
Bi#z}T

diff --git a/ThreadCancellation_async/master_slave/.vs/master_slave/v17/Browse.VC.db b/ThreadCancellation_async/master_slave/.vs/master_slave/v17/Browse.VC.db
index 4668bd2187691eda7c75fd4f5ffb8ad517c99892..c257e2aa63097b0749a0355f5ff3f593d5402e80 100644
GIT binary patch
delta 2825
zcmZwJ3se->835pWXYS5p-)~T08HrdSP!R#$MrA<}OazI5(LkAHmtDp3DlUj=6E+LU
zntIaOsvS=xEhbIcqz^Hi_IeVi>m#J6Cn;K+Q{^;08V^+)<0BrAimB;83#83scE6qf
z{&VO4vv+6jZa6&7hQZ(;mov}c-Ld8Nq-PMDk>GD@49HEPK+9ISrLD0bH-AaKv#)3O
zwdD@%9?}$sq)g^%8=Jv=u^$uuQqJERVtR&NmUAS{8dC0X>^?sv4c+P4nu^y9HUE5X
zjGI+~wazNad$EHdiB}RQsN}<MJB<jjZ$u^q*d2`AbwqD=W556w5TF4Z;DG={panXh
z2L^hx+i1CnJ&ML_>Lo^pQBQYxO)CjK*=R}?utcvno073rU>TMmG!mEzd{I}c37CNe
zSb+`Lfde=}0!Re2z-*8Nl0gb^fm9%YIUo%@0Oo>pFb{kK%%`r_jDOuAjOHVx#2V_8
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z$(A+9rAE_(Cc#bdzYykUteTFG)!5&kU9rFLsgcK<n6z1i76mVvc;Fv}xf_4>_tATQ
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delta 2062
zcmZA2e^Ars9l-JDdA?8b{gLFG00{<x5G^PmSbhX1)B>hj#43nDZOe~u0tr7_`C$@}
z-Rz{nyHx3J+i~sV?${O9weF8uv21-j$23)EuiZSQyX}<TR+UoQ^@cL)-Bz!<PtyLg
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zoIKhwey75QOJ;PHA!jaLOcHX)|E|NI{@+|jUkESEyrC61bv1OC%{G2>#yRuvL%|GO
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z&S%RM>%K%R>TOG9+AlW9$MZb7m~Zsvx(N4l<i1bvW|rNVo1W@73aO;Cr_ZPLbnd&U
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Od*Tm{9~d4wBK{W<{M4`j

diff --git a/ThreadCancellation_async/master_slave/.vs/master_slave/v17/DocumentLayout.json b/ThreadCancellation_async/master_slave/.vs/master_slave/v17/DocumentLayout.json
index cd676fd..7cbaa84 100644
--- a/ThreadCancellation_async/master_slave/.vs/master_slave/v17/DocumentLayout.json
+++ b/ThreadCancellation_async/master_slave/.vs/master_slave/v17/DocumentLayout.json
@@ -52,7 +52,7 @@
               "RelativeDocumentMoniker": "master_slave.c",
               "ToolTip": "E:\\MultiThreading_Part_A\\ThreadCancellation_async\\master_slave\\master_slave.c",
               "RelativeToolTip": "master_slave.c",
-              "ViewState": "AQIAAAAAAAAAAAAAAAAAAA0AAAAZAAAA",
+              "ViewState": "AQIAAB4AAAAAAAAAAAAQwC4AAAARAAAA",
               "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000423|",
               "WhenOpened": "2024-03-14T10:31:49.359Z",
               "EditorCaption": ""
@@ -65,7 +65,7 @@
               "RelativeDocumentMoniker": "main.c",
               "ToolTip": "E:\\MultiThreading_Part_A\\ThreadCancellation_async\\master_slave\\main.c",
               "RelativeToolTip": "main.c",
-              "ViewState": "AQIAACEAAAAAAAAAAAAAAAEAAAAAAAAA",
+              "ViewState": "AQIAACQAAAAAAAAAAAAAAAEAAAAAAAAA",
               "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000423|",
               "WhenOpened": "2024-03-14T10:21:23.52Z",
               "EditorCaption": ""
diff --git a/ThreadCancellation_async/master_slave/.vs/slnx.sqlite b/ThreadCancellation_async/master_slave/.vs/slnx.sqlite
index 1a2d8924978b33fd8d13c26eb1ca61f1ff3b3de5..efb64e2119f0d87f6ab149405bc3d67d2b855c6b 100644
GIT binary patch
delta 34
qcmZo@;Am*zm>|uVKT*b+F@Ix1*?QI(-IbF*HQ!#p{q}lB)c^qCL=Hg!

delta 34
qcmZo@;Am*zm>|uVHBrWyF>7N&*?Lx+n!8>x&9~QYzrCJOH2?tHA`QF%

diff --git a/ThreadCancellation_async/master_slave/master_slave.c b/ThreadCancellation_async/master_slave/master_slave.c
index a6e9016..077914e 100644
--- a/ThreadCancellation_async/master_slave/master_slave.c
+++ b/ThreadCancellation_async/master_slave/master_slave.c
@@ -1,5 +1,20 @@
 #include "master_slave.h"
 
+void
+memory_cleanup_handler(void* arg) {
+	
+	printf("%s invoked ...\n", __FUNCTION__);
+	free(arg);
+}
+
+void
+file_cleanup_handler(void* arg) {
+	
+	printf("%s invoked ...\n", __FUNCTION__);
+	fclose((FILE*)arg);
+
+}
+
 void *
 write_into_file(void* arg) {
 	
@@ -14,15 +29,22 @@ write_into_file(void* arg) {
 	/* Mode of cancellation */
 	pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, 0);
 	int* thread_id = (int*)arg;
+
+	/* When pthread_cancel is invoked and this thread get the
+	signal to get cancelled, this API is invoked to free up the 
+	resources used by this thread.*/
+	pthread_cleanup_push(memory_cleanup_handler, arg);
 	
 	sprintf(file_name, "thread_%d.txt", *thread_id);
 
 	FILE* fptr = fopen(file_name, "w");
 
+	pthread_cleanup_push(file_cleanup_handler, fptr);
+
 	if (!fptr) {
 		printf("Error : Could not open log file %s, errno = %d\n",
 			file_name, errno);
-		return 0;
+		pthread_exit(0);
 	}
 
 	while (1) {
@@ -32,6 +54,16 @@ write_into_file(void* arg) {
 		sleep(1);
 	}
 
-	fclose(fptr);
+	/* If this thread is successfully executed and the cancellation request
+	is not invoked till now then, the stack where resource free API are
+	need to be cleaned.*/
+	pthread_cleanup_pop(0);
+	pthread_cleanup_pop(0);
+
+	/*This is not executed as this thread is in infinite loop
+	and when the pthread_cancel is executed this thread is cancelled
+	while it was executing in the loop. Hence, this causes resource
+	leakage.*/
+	// fclose(fptr);
 	return 0;
 }
\ No newline at end of file