Add the course threads example, fixed.

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

diff --git a/.gitignore b/.gitignore
index 3c9893612822624455e95c15627859783268fc59..6612f926d14acdd103728bc0085a198960c6730e 100644 (file)
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
+TD3/exo2/monexec/monexec
 philosophe/philosophe
 prodcons/prodcons
-TD3/exo2/monexec/monexec
+threads/exemple1
 exo[[:digit:]]
 !exo[[:digit:]]/
 

diff --git a/threads/Makefile b/threads/Makefile
new file mode 100644 (file)
index 0000000..3e08c99
--- /dev/null
+++ b/threads/Makefile
@@ -0,0 +1,83 @@
+# Sample Makefile to build simple project.
+#
+# This Makefile expect all source files (.c) to be at the same level, in the
+# current working directory.
+#
+# It will automatically generate dependencies, compile all files, and produce a
+# binary using the provided name.
+#
+# Set BINARY_NAME to the name of the binary file to build.
+# Set BUILD_TYPE to either debug or release
+#
+# Automatic dependencies code from:
+# http://make.mad-scientist.net/papers/advanced-auto-dependency-generation/#tldr
+BINARY_NAME=exemple1
+BUILD_TYPE=debug
+#BUILD_TYPE=release
+LDLIBS=-lpthread
+
+# ====================================
+# DO NOT CHANGE STUFF BEYOND THIS LINE
+# ====================================
+
+all: $(BINARY_NAME)
+
+CC=gcc
+LD=gcc
+
+WARN_FLAGS = -Wall -Wextra
+STD_FLAG = -std=c11
+
+ifeq ($(BUILD_TYPE),debug)
+BUILDDIR := .build/debug
+DEBUG_FLAG = -g
+DEBUG = 1
+STRIP_FLAG =
+OPTI_FLAG = -O0
+else
+BUILDDIR := .build/release
+DEBUG_FLAG =
+DEBUG = 0
+STRIP_FLAG = -s
+OPTI_FLAG = -O3
+endif
+
+CFLAGS := -DDEBUG=$(DEBUG) $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG)
+LDFLAGS := $(LDFLAGS) $(STRIP_FLAG)
+
+OBJDIR := $(BUILDDIR)/objs
+$(shell mkdir -p $(OBJDIR))
+
+SRCS=$(wildcard *.c)
+OBJS=$(patsubst %.c,$(OBJDIR)/%.o,$(SRCS))
+
+DEPDIR := $(BUILDDIR)/deps
+$(shell mkdir -p $(DEPDIR))
+DEPFLAGS = -MT $@ -MMD -MP -MF $(DEPDIR)/$*.Td
+POSTCOMPILE = mv -f $(DEPDIR)/$*.Td $(DEPDIR)/$*.d
+
+$(BINARY_NAME): $(OBJS)
+       @echo "[LD ] $@"
+       @$(LD) $(CFLAGS) $(LDFLAGS) $^ $(LDLIBS) -o $@
+
+$(OBJDIR)/%.o: %.c $(DEPDIR)/%.d
+       @echo "[C  ] $*"
+       @$(CC) $(DEPFLAGS) $(CFLAGS) -c $< -o $@
+       @$(POSTCOMPILE)
+
+$(DEPDIR)/%.d: ;
+
+.PRECIOUS: $(DEPDIR)/%.d
+
+include $(wildcard $(patsubst %,$(DEPDIR)/%.d,$(basename $(SRCS))))
+
+clean:
+       @echo "[CLN]"
+       -@rm -r $(BUILDDIR)
+       -@rm $(BINARY_NAME)
+
+disassemble: $(BINARY_NAME)
+       objdump -d $< | less
+
+symbols: $(BINARY_NAME)
+       objdump -t $< | sort | less

diff --git a/threads/exemple1.c b/threads/exemple1.c
new file mode 100644 (file)
index 0000000..d8cc0ed
--- /dev/null
+++ b/threads/exemple1.c
@@ -0,0 +1,58 @@
+//exemple1.c
+
+#define _REENTRANT
+#include <pthread.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+void afficher(int n, char lettre)
+{
+       int j;
+       for (j = 1; j < n; j++) {
+               printf("%c", lettre);
+               fflush(stdout);
+       }
+}
+
+void *threadA(void *inutilise)
+{
+       afficher(100, 'A');
+       printf("\n Fin du thread A\n");
+       fflush(stdout);
+       pthread_exit(NULL);
+}
+
+void *threadC(void *inutilise)
+{
+       afficher(150, 'C');
+       printf("\n Fin du thread C\n");
+       fflush(stdout);
+       pthread_exit(NULL);
+}
+
+void *threadB(void *inutilise)
+{
+       pthread_t thC;
+       pthread_create(&thC, NULL, threadC, NULL);
+       afficher(100, 'B');
+       printf("\n Le thread B attend la fin du thread C\n");
+       pthread_join(thC, NULL);
+       printf("\n Fin du thread B\n");
+       fflush(stdout);
+       pthread_exit(NULL);
+}
+
+int main()
+{
+       pthread_t thA, thB;
+       printf("Création du Thread A\n");
+       pthread_create(&thA, NULL, threadA, NULL);
+       pthread_create(&thB, NULL, threadB, NULL);
+       sleep(1);               // simule un traitement
+       printf("Le processus principal attend que les autres se terminent\n");
+       // attendre la fin des threads
+       pthread_join(thA, NULL);
+       pthread_join(thB, NULL);
+       exit(0);
+}